datavorous/entrance-exam-dataset huggingface dataset:
When selection acts to eliminate both extremes from an array of phenotypes, the frequency of intermediate type, which is already present in more, gets increased. This type of selection is called

Options:
A Disruptive selection
B Directional selection
C Stabilising selection
D Non-directional selection

The correct answer is:
Stabilising selection

Solution:
Stabilizing selection or normalizing selection occurs when selection acts to eliminate both extremes from an array of phenotypes. The frequency of the intermediate phenotype, which is already the most common, gets increased.

Topic: Biology, Evolution, NEET
When small amount of SbCl 5 is added to a solution of D+-2-chloro-2-phenylethane in toluene, it gets racemises slowly due to the formation of

Options:
A Carbocation
B Carbene
C Free radical
D Carbanion

The correct answer is:
Carbocation

Solution:

Topic: Chemistry, General Organic Chemistry, NEET
When solid lead iodide is added to water, the equilibrium concentration of I- becomes 2.6×10-3 M. What is the Ksp for PbI2?

Options:
A 2.2×10-9
B 8.8×10-9
C 1.8×10-8
D 3.5×10-8

The correct answer is:
8.8×10-9

Solution:
The equilibrium is PbI2⇌Pb2++2I-
On the basis of this equation, the concentration of Pb2+ ions will be half of the concentration of I- ions. Thus,
[I-]=2.6×10-3M and [Pb2+]=1.3×10-3M
Ksp=[Pb2+][I-]2=[1.3×10-3M][2.6×10-3M]2
Ksp=8.8×10-9.

Topic: Chemistry, Ionic Equilibrium, NEET
When solute is mixed in solution, the water potential of the solution

Options:
A Increases
B Decreases
C First increases and than decreases
D No change occurs

The correct answer is:
Decreases

Solution:
Water potential refers to the potential energy present in water molecules in free state. In pure state water potential of pure water is maximum and its value is zero. On adding solutes free energy of water decreases, thus water potential decreases. Water potential of a solution is always negative and it decreases on addition of solute.

Topic: Biology, Transport in Plants, NEET
When stamens are attached to perianth, it is known as

Options:
A epipetalous
B episepalous
C gynandrous
D epiphyllous

The correct answer is:
epiphyllous

Solution:
The male reproductive organ of a flower is known as the stamen. Each stamen has two parts anther and a stalk (filament). The stamens of the flower may be found united among themselves or with the other floral members such as the petals and sepals. When the stamens are found attached to the perianth like in the flowers of Lily they are known as epiphyllous and when they are found attached to the petals like in flowers of brinjal they are known as epipetalous. The stamens are known as episepalous when they are attached to the sepals. Gynandrous flowers are those which have stamens and pistils in a single column, eg: orchids.

Topic: Biology, Morphology of Flowering Plants, NEET
When strong base (NaOH) is added to the weak acid (acetic acid, CH3COOH) , then dissociation of acetic acid increases; this effect is known as

Options:
A common ion effect
B reverse ion effect
C saltation effect
D solubility effect

The correct answer is:
reverse ion effect

Solution:
CH 3 COOH + NaOH⇌ CH 3 COONa +  H 2 O
Ionisation of acetic acid will increase with the progress of its neutralization. This effect is called reverse ion effect.

Topic: Chemistry, Ionic Equilibrium, NEET
When strontium (Sr) reacts with hydrochloric acid (HCl), which gas is liberated?

Options:
A Oxygen (O2)
B Nitrogen (N2)
C Carbon dioxide (CO2)
D Hydrogen (H2)

The correct answer is:
Hydrogen (H2)

Solution:
Strontium (Sr) reacts with hydrochloric acid to liberate hydrogen gas (H2) as a product.

Topic: Chemistry, s Block Elements, NEET
When sulphur dioxide reacts with sodium hydroxide, what is formed initially?

Options:
A Sodium hydrogen sulphite
B Sodium sulphite
C Sodium hydroxide
D Sodium chloride

The correct answer is:
Sodium sulphite

Solution:
The passage states that when sulphur dioxide reacts with sodium hydroxide, it initially forms sodium sulphite.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
When sulphur in the form of S8 is heated at 900 K the initial pressure of 1 atm falls by 29% at equilibrium. This is because of conversion of some S8 to S2 . Find the value of equilibrium constant for this reaction.

Options:
A 2.55 atm3
B 255 atm3
C 25.5 atm3
D None

The correct answer is:
2.55 atm3

Solution:
S8(g)11-xâ4S2(g)04x
x=29%=0.29
Kp=(PS2)4(PS8)=(4x)2(1-x) atm3
=(4Ã0.29)41-0.29=2.55 atm3 .

Topic: Chemistry, Chemical Equilibrium, NEET
When sunlight is scattered by atmospheric atoms and molecules the amount of scattering of light of wavelength 880 nm is A. Then, the amount of scattering of light of wavelength 330 nm is approximately

Options:
A 10 A
B 20 A
C 40 A
D 50.5 A

The correct answer is:
50.5 A

Solution:
We know from Rayleight's law of scattering
Iâ1Î»4
So, I1I2=Î»2Î»14
â AI2=3308804=384=814096
I2=409681 A=50.57A

Topic: Physics, Wave Optics, NEET
When synapsis is complete all along the chromosome, the cell is said to have entered a stage called

Options:
A Zygotene
B Pachytene
C Diplotene
D Diakinesis

The correct answer is:
Pachytene

Solution:
Synapsis is the pairing of homologous chromosomes during the zygotene stage of meiosis. Each pair is called bivalent. One chromosome of the pair comes from the male parent and other from the female parent. Each member of the pair is of the same length, their centromeres are in the same position and they usually have the same number of genes arranged in the same order. After zygotene stage, cell enters in pachytene stage in which the bivalents become spiralled, shortened and thickened.

Topic: Biology, Cell Cycle and Cell Division, NEET
When synapsis is completed all along the chromosome, the cell is said to have entered a stage called

Options:
A Zygotene
B Pachytene
C Diplotene
D Diakinesis

The correct answer is:
Pachytene

Solution:
Synapsis or syndesis is the process of pairing of homologous chromosome to form bivalent, it occurs during zygotene of prophase I of meiosis. After completion of pairing the cell enter Pachytene where crossing over occurs.

Topic: Biology, Cell Cycle and Cell Division, NEET
When temperature decreases, oxyhaemoglobin curve will become

Options:
A More steep
B Straight
C Parabola
D All of these

The correct answer is:
More steep

Solution:
The oxygen–haemoglobin dissociation curve is sigmoid, which represents the relationship between oxygen concentration and percentage saturation of haemoglobin. The rise in temperature or fall in pH shifts the curve to the right, whereas at decreased temperature and rise in pH, the curve becomes more steep. Low temperature increases the affinity of haemoglobin towards oxygen.

Topic: Biology, Breathing and Exchange of Gases, NEET
When tert-butyl alcohol is heated with Cu at 573 K, it forms

Options:
A butanal
B propanal
C ethyl methyl ketone
D 2-methylprop-1-ene

The correct answer is:
2-methylprop-1-ene

Solution:
When tert-butyl alcohol is heated with Cu at 573 K, it forms 2-methylprop-1-ene.

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
When testing for halogens, what does "X" represent in the chemical equation X– + Ag+ → AgX?

Options:
A Oxygen
B Sodium
C Hydrogen
D A halogen - Cl, Br, or I

The correct answer is:
A halogen - Cl, Br, or I

Solution:
"X" represents a halogen, which can be chlorine (Cl), bromine (Br), or iodine (I).

Topic: Chemistry, General Organic Chemistry, NEET
When the activity of one gene is suppressed by the activity of a non-allelic gene, it is known as?

Options:
A Pseudo-dominance
B Hypostasis
C Epistasis
D Incomplete dominance

The correct answer is:
Epistasis

Solution:
The gene interaction in which two non allelic gene interacts in which, one gene mask or suppresses the activity of another gene present at different gene locus. The gene which suppresses the activity is known as epistatic gene and the gene which is suppressed is known as hypostatic gene.

Topic: Biology, Principles of Inheritance and Variation, NEET
When the angle of incidence on a material is 60o, the reflected light is completely polarised. The velocity of the refracted ray inside the material is (in ms-1 )

Options:
A 3×108
B 32×108
C 3×108
D 0.5×108

The correct answer is:
3×108

Solution:
Refractive index Î¼=tanip=tan60o=3
So, the velocity of refracted ray inside the material
v=cÎ¼=3Ã1083=3Ã108 m s-1

Topic: Physics, Ray Optics, NEET
When the angle of incidence on a transparent material is 60°, the reflected light is completely polarised. The velocity of refracted ray inside the material is

Options:
A 3×108 m s-1
B 3×108 m s-1
C 32×108 m s-1
D 13×108 m s-1

The correct answer is:
3×108 m s-1

Solution:
μ=tanip
∴cv=tanip
∴v=3×1083=3×108 m s-1

Topic: Physics, Ray Optics, NEET
When the angle of incidence on the material is 60°, the reflected light is completely polarised. The velocity of refracted ray inside the material is

Options:
A 3 × 1 0 8 m/s
B 3 2 × 1 0 8 m/s
C 3 Ã 1 0 8 m/s
D 1 3 × 1 0 8 m/s

The correct answer is:
3 × 1 0 8 m/s

Solution:
μ=tanip
∴cv=tanip
∴v=3×1083=3×108 m/s

Topic: Physics, Wave Optics, NEET
When the arrangement consisting of a horizontal thick copper wire of length 2L and radius 2R, one end of which is welded to an end of another horizontal thin copper wire of length L and radius R is stretched by applying forces at two ends. Ratio of the elongation in the thick wire to that in the thin wire at equilibrium is

Options:
A 0.50
B 0.25
C 4.00
D 2.00

The correct answer is:
0.50

Solution:
Δℓ=FLAY

Δℓ1Δℓ2=L1A1A2L2=2Lπ(2R)2×πR2L=12

Topic: Physics, Mechanical Properties of Solids, NEET
When the centromere is situated in the middle of two equal arms of chromosomes, the chromosome is referred as:

Options:
A Metacentric
B Telocentric
C Sub-metacentric
D Acrocentric

The correct answer is:
Metacentric

Solution:
The position of a centromere can be metacentric (centromere at the centre), sub-metacentric (centromere near at the centre), acrocentric (centromere near the end) or telocentric (centromere at the end). The metacentric chromosomes take the "V" shape during cell division.

Topic: Biology, Cell - The Unit of Life, NEET, NEET 2021
When the concentration of alkyl halide is triple and concentration of is reduced to half, the rate of SN2 reaction increased by

Options:
A 3 times
B 1.5 times
C 2 times
D 6 times

The correct answer is:
1.5 times

Solution:
Rate (R1)=[x]1[y]1 â¦(i)
Rate (R2)=(3x)1y21 â¦(ii)
Comparing equation (i) and (ii)
R 2  = 1.5  R 1

Topic: Chemistry, Haloalkanes and Haloarenes, NEET
When the current changes from + 2 A to - 2 A in 0.05 s, an EMF of 8 V is induced in a coil. The coefficient of self-induction of the coil is

Options:
A 0.2 H
B 0.4 H
C 0.8 H
D 0.1 H

The correct answer is:
0.1 H

Solution:
L=-edi/dt=-8Ã0.05-4=0.1 H

Topic: Physics, Electromagnetic Induction, NEET
When the current in a coil changes from 5 A to 2 A in 0.1 s, an average voltage of 50 V is produced. The self-inductance of the coil is

Options:
A 1.67 H
B 6 H
C 3 H
D 0.67 H

The correct answer is:
1.67 H

Solution:
Magnetic flux
Ï=LI â âÏât=L âIât
â´ Îµindaverage= âÏât=L âIât
â 50=L Ã 5-20.1
â 53=L
â L=1.67 H

Topic: Physics, Electromagnetic Induction, NEET
When the different structures evolve in the same direction due to adaptation to similar needs, it is then referred to as?

Options:
A adaptive convergence
B divergent evolution
C homology
D analogy

The correct answer is:
analogy

Solution:
Analogy, or analogous structures, is the one that does not indicate there is a recent common ancestor between two organisms. Even though the anatomical structures being studied look similar and maybe even perform the same functions, they are a product of convergent evolution. Convergent evolution is the process whereby groups from the different ancestor evolve and accumulate similarities.

Topic: Biology, Evolution, NEET
When the energy of the incident radiation is increased by 20%, the kinetic energy of the photoelectrons emitted from a metal surface increased from emitted 0.5 eV to 0.8 eV. The work function of the metal is:

Options:
A 0.65Â eV
B 1.0 eV
C 1.3Â eV
D 1.5Â eV

The correct answer is:
1.0 eV

Solution:
We know that, KEmax=hv- ψ

Let initial frequency of the light be ν and final frequency be ν'. According to question, final energy of light is 20% more than initial energy.

∴ν'=1.2ν

In the 1st case,
0.5 eV=hv- ψ ...(i)

In the 2nd case,
0.8eV=1.2 hv- ψ ...(ii)

Solving (i) and (ii) simultaneously, we get,

ψ =1 eV

Topic: Physics, Dual Nature of Matter, NEET, NEET 2014
When the first element of the periodic table is treated with dioxygen, it gives a compound whose solid state floats on its liquid state. This compound has an ability to act as an acid as well as a base. What products will be formed when this compound undergoes autoionisation?

Options:
A H2O and O2
B H3O+and OH-
C H+and OH-
D H+and H2O2

The correct answer is:
H3O+and OH-

Solution:
Correct Option is : (B)
H3O+and OH-

Topic: Chemistry, Hydrogen, NEET
When the following aldohexose exists in its D – configuration, the total number of stereoisomers in its pyranose form is

Options:
A 2
B 4
C 6
D 8

The correct answer is:
8

Solution:
d-configuration
number of chiral centres that can be changed = 3
number of stereoisomers =2n=23=8

Topic: Chemistry, Biomolecules, NEET
When the forward bias voltage of a diode is changed from 0.6 V to 0.7 V, the current changes from 5 mA to 15 mA. Then its forward bias resistance is

Options:
A 0.01 Ω
B 0.1 Ω
C 10 Ω
D 100 Ω

The correct answer is:
10 Ω

Solution:
Forward biased resistance = ∆V∆I=0.7-0.615-5×10-3
=0.110×10-3=10 Ω

Topic: Physics, Semiconductors, NEET
When the hydrogen spectral lines in the Lyman series are shifted to the Deuterium spectrum, what is the change in the wavelengths of the first four lines, given that the original wavelengths are 1218 Å, 1028 Å, 974.3 Å, and 951.4 Å?

Options:
A 1218.3 Å, 1028.3 Å, 974.4 Å, 951.2 Å
B 1217.7 Å, 1027.7 Å, 974.04 Å, 951.143 Å
C 1218.6 Å, 1028.6 Å, 974.6 Å, 951.5 Å
D 1218.2 Å, 1028.2 Å, 974.3 Å, 951.1 Å

The correct answer is:
1217.7 Å, 1027.7 Å, 974.04 Å, 951.143 Å

Solution:
Correct Option is : (B)
1217.7 Å, 1027.7 Å, 974.04 Å, 951.143 Å

Topic: Chemistry, Atomic Physics, NEET
When the length of the vibrating segment of a sonometer wire is increased by 1% the percentage changes its frequency is

Options:
A 100101
B 99100
C 1
D 2

The correct answer is:
1

Solution:
The frequency of sonometer wire is
v=12lTm
Taking logarithm and differentiating, we get
∆vv=∆ll+12∆TT+12∆mm
∴∆vv=∆ll=1%
Hence, frequency will increase by 1%

Topic: Physics, Waves and Sound, NEET
When the light of frequency 2 ν 0 (where ν 0 is threshold frequency), is incident on a metal plate, the maximum velocity of electrons emitted is v1. When the frequency of the incident radiation is increased to 5ν0, the maximum velocity of electrons emitted from the same plate is v2. The ratio of v1 to v2 is

Options:
A 4 : 1
B 1 : 4
C 1 : 2
D 2 : 1

The correct answer is:
1 : 2

Solution:
From Einstein's equation of Photoelectric effect, we can write
For case 1: 12mv12=2hν0−hν0 ⇒12mv12=hv0 ... (i), where m is mass of electron, h is Planck's constant.
For case 2: 12mv22=5hν0−hν0⇒12 mv22=4hν0 ... (ii)
From (1) and (2)
v1v2=14=12.

Hence, the ratio of v1 and v2 is 1:2.

Topic: Physics, Dual Nature of Matter, NEET, NEET 2018
When the light of wavelength 300nm or less falls on a photoelectric emitter A, photoelectrons are emitted. For another emitter B, the light of wavelength 600nm is sufficient for releasing photoelectrons. The ratio of the work function of emitter A to B is

Options:
A 1:2
B 2:1
C 4:1
D 1:4

The correct answer is:
2:1

Solution:
Work function is given by
Ïâ=hcÎ»or Ïââ1Î»
âµ Ï 1 Ï 2 = Î» 2 Î» 1
= 6 0 0 3 0 0 = 2 1

Topic: Physics, Dual Nature of Matter, NEET
When the margins of sepals or petals overlap one another without any particular direction, the condition is termed as:

Options:
A Vexillary aestivation
B Imbricate aestivation
C Twisted aestivation
D Valvate aestivation

The correct answer is:
Imbricate aestivation

Solution:
When the margins of sepals or petals overlap one another without any particular direction, the condition is termed as imbricate aestivation.

Topic: Biology, Morphology of Flowering Plants, NEET, NEET 2014
When the margins of sepals or petals overlap one another without any particular direction, the condition is termed as:

Options:
A Vexillary aestivation
B Imbricate aestivation
C Twisted aestivation
D Valvate aestivation

The correct answer is:
Imbricate aestivation

Solution:
When the margins of sepals or petals overlap one another without any particular direction, the condition is termed as imbricate aestivation.

Topic: Biology, Morphology of Flowering Plants, NEET
When the momentum of a photon is changed by an amount pâ², the corresponding change in the de-Broglie wavelength is found to be 0.2%. Then, the original momentum of the photon was

Options:
A 300Â p′
B 500p′
C 400Â p′
D 100p′

The correct answer is:
500p′

Solution:
âµÂ Â Â Â Î»=hp
â´Â Â Â Â Â Î»â1p
âÂ Â Â Â Îpp=Â -ÎÎ»Î»
â´Â Â Â Â Â Îpp=ÎÎ»Î»
âÂ Â Â Â p′p=0.20100=1500
âÂ Â Â Â p=500p′

Topic: Physics, Atomic Physics, NEET
When the nucleus of 238U92 disintegrates to give one nucleus of 206U82; the number of Î±-particles emitted and the number of Î²-particles emitted is

Options:
A 4 and 8 respectively
B 6 and 8 respectively
C 8 and 6 respectively
D 8 and 10 respectively

The correct answer is:
8 and 6 respectively

Solution:
8 and 6 respectively.

Topic: Physics, Nuclear Physics, NEET
When the nucleus of 238U92 disintegrates to give one nucleus of U82206; the number of Î±-particles emitted and the number of Î²-particles emitted is

Options:
A 4 and 8 respectively
B 6 and 8 respectively
C 8 and 6 respectively
D 8 and 10 respectively

The correct answer is:
8 and 6 respectively

Solution:
When an α particle is emitted, the atomic number decreases by 2 and the mass number decreases by 4.

The number of alpha particles emitted is

Nα=238-2064=324=8.

When 8 alpha particles are emitted the atomic number decreases by 2×8=16, from 92 to 92−16=76. When a β particle is emitted, the atomic number increases by 1. The number of β particles emitted is

Nβ=82−76=6

Topic: Physics, Nuclear Physics, NEET
When the observer moves towards the stationary source with velocity V1, the apparent frequency of the emitted note is F1. When the observer moves away from the source with velocity V1, the apparent frequency is F2. If V is the velocity of sound in air and F1F2=2 then VV1=?

Options:
A 2
B 3
C 4
D 5

The correct answer is:
3

Solution:
F1F2=2 , Speed of approach = Speed of leaving
The apparent frequency of sound observed by observer when it is approaching source is given by
F 1 = V+ V 1 V . f 0 ....(i)
When observer is moving away from source
F 2 = Vâ V 1 V f 0 ....... (ii)
Here f0 is the frequency of sound wave
Taking ratio of (i) with (ii) we have
F1F2=VV-V1ÃV+V1V=V+V1V-V1
â´ 2=V+V1V-V1
â´ 2V-2V1=V+V1
â´ 2V-V=3V1
â´ VV1=3

Topic: Physics, Waves and Sound, NEET
When the output of an OR gate is applied as input to a NOT gate, then the combination acts as a

Options:
A NAND gate
B NOR gate
C AND gate
D OR gate

The correct answer is:
NOR gate

Solution:
When the output of an OR gate is applied as jnput to a NOT gate, then the combination acts as NOR gate.

Topic: Physics, Semiconductors, NEET, NEET 2024 (Re-NEET)
When the pollen of a flower is transferred to the stigma of another flower of a different plant, the pollination is referred to as

Options:
A xenogamy
B geitonogamy
C autogamy
D allogamy

The correct answer is:
xenogamy

Solution:
Xenogamy refers to transfer of pollen grains from anther to the stigma of a different plant. It is genetically different types of pollen grains to the stigma. Transfer of pollen grains from anther lobe to stigma of another flower on same plant is called geitonogamy. It is genetically self pollination as the pollen are transferred to same plant, but functionally it is cross pollination as agent is involved to bring about transfer.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET
When the pollen tube enters the embryo sac, which of the following cell usually gets burst on its entry:

Options:
A Both synergids
B Central cell
C Antipodals
D One of the two synergids

The correct answer is:
One of the two synergids

Solution:
Pollen tube can enter ovule through micropyle, chalaza and integuments, but it enters embryo sac always through micropylar end in one of the two synergid. Pollen tube always enters in degenerating synergid. Filliform apparatus of synergid secretes chemotactic substance which attracts pollen tube towards embryo sac.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET
When the resistance wire is passed through a die the cross-section area decreases by 1%, the change in resistance of the wire is

Options:
A 1% decrease
B 1% increase
C 2% decrease
D 2% increase

The correct answer is:
2% increase

Solution:
Resistance of a wire is
R=ρlA
ΔRR=Δll-ΔAA=1--1=2%

Topic: Physics, Current Electricity, NEET
When the SA node generates an action potential, it stimulates the atrial systole, which results in

Options:
A complete ventricular filling
B complete emptying of atria
C increased flow of blood into the ventricles by about 30%, but semilunar valves must be open
D increased flow of blood into the ventricle by about 30% but semilunar valves must be closed

The correct answer is:
increased flow of blood into the ventricle by about 30% but semilunar valves must be closed

Solution:
Conduction system of the heart consists of SA node, AV node, Bundle of His, and Purkinje fibers. This system is responsible for contraction and relaxation of heart i.e. systole and diastole which constitutes the cardiac cycle. As SA node begins its conduction, the atria begin to contract, as a result of which the AV valves open and blood from atria enter the ventricles. During this phase, the ventricles are in a relaxed state and thus the semilunar valves are closed. The blood flow is increased by 30% from auricle to ventricle.

Topic: Biology, Body Fluids and Circulation, NEET
When the same structure evolves in a different direction due to adaptation to a different need, it is referred to as

Options:
A Adaptive convergence
B Divergent evolution
C Convergent evolution
D Analogy

The correct answer is:
Divergent evolution

Solution:
Divergent evolution is the process whereby groups from the same common ancestor evolve and accumulate differences, resulting in the formation of new species.

Topic: Biology, Evolution, NEET
When the stamens are attached to the petals, they are ___.

Options:
A Epiphyllous
B Epipetalous
C Monadelphous
D Diadelphous

The correct answer is:
Epipetalous

Solution:
When the stamens are attached to the petals, they are Epipetalous.

Topic: Biology, Morphology of Flowering Plants, NEET
When the switch S, in the circuit shown, is closed, then the value of current i will be:

Options:
A 2 A
B 5 A
C 3 A
D 4 A

The correct answer is:
5 A

Solution:
i=i2+i2
V-02=20-V2+10-V4
2V+V-10+2(V-20)=0
5V-50=0
V=10 V
i=102=5 A

Topic: Physics, Current Electricity, NEET
When the temperature of metal sphere is increased by 40 Â°C, Its volume increases by 0.24%. The coefficient of linear expansion of the metal (in oC-1) is

Options:
A 2Ã10-5
B 6×10-5
C 2.1×10-5
D 1.2×10-5

The correct answer is:
2×10-5

Solution:
γ=ΔVV.ΔT=0.24100×40=6×10-5/°C

⇒α=γ3=2×10-5/°C.

Topic: Physics, Thermal Properties of Matter, NEET
When the voltage and current in a conductor are measured as 100Â±4 V and 5Â±0.2 A, then the percentage of error in the calculation of resistance is

Options:
A 8%
B 4%
C 20%
D 10%

The correct answer is:
8%

Solution:
Given, VÂ±âV=100Â±4 V
IÂ±âI=5Â±0.2 A
â âRR=âVV+âII=4100+0.25=0.08
â âRR%=0.08Ã100=8%

Topic: Physics, Units and Dimensions, NEET