Ohm's law, application and Virtual Lab
Channel: Physics Partner
Date: 2023-03-25

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Here is the link of the video to revise the fundamental concepts of current voltage and resistance 

                https://www.youtube.com/watch?v=JP86AfMRjok

Ohm's Law is a fundamental principle in electrical engineering that describes the relationship between voltage, current, and resistance. The law states that the current flowing through a conductor is directly proportional to the voltage applied across it and inversely proportional to its resistance. This means that if we increase the voltage applied to a circuit, the current will also increase, while increasing the resistance will decrease the current.

Ohm's Law has numerous applications in electrical engineering. It is used to design and analyze circuits, calculate power dissipation, and determine appropriate resistor values for specific applications. It also helps engineers understand how different components affect circuit behavior.

One practical application of Ohm's Law is in designing LED circuits. By using Ohm's Law to calculate the correct resistor value for an LED circuit, engineers can ensure that the LED operates within its safe operating range and does not burn out prematurely.

Overall, Ohm's Law is an essential concept for anyone interested in understanding or working with electrical circuits. Its applications are vast and varied, making it a valuable tool for engineers across many industries.


Notes for IGCSE/Edexcel/AQA students

According to the Cambridge IGCSE curriculum, Ohm's Law states that the current flowing through a conductor is directly proportional to the voltage applied across it, provided that its temperature and other physical conditions remain constant.

The law was named after Georg Simon Ohm, a German physicist who first discovered this relationship in 1827. The formula for Ohm's Law is I = V/R, where I represents current in amperes (A), V represents voltage in volts (V), and R represents resistance in ohms (Ω).

This law has numerous practical applications in various fields such as electronics, telecommunications, and power generation. It helps engineers design circuits with specific electrical characteristics by calculating the necessary values of voltage, current or resistance.

In conclusion, understanding Ohm's Law is essential for anyone interested in working with electricity or electronics. It provides a basic foundation for designing circuits and troubleshooting problems related to electrical systems.