[DOC] [TLE] Atmospheric electricity - Wikipedia [PAR] Atmospheric electricity is the pattern of electrical charges in the Earth's 
atmosphere The normal ... The combined negative electric potential of all the 
coalescing water drops rises .... is in summer about 60 to 100 volts and in winter 
300 to 500 volts per meter of .... The cavity is naturally excited by energy from 
lightning strikes. [DOC] [TLE] Atmospheric electricity - Electric Universe - Electric Universe theory [PAR] Apr 19, 2010 ... Atmospheric electricity is the regular diurnal variations of the Earth's ... with 
altitude at the rate, according to some writers, of about 30 volts per foot. ... that 
with a given charge of electricity its potential rises as the electrical capacity of the 
.... to a large external field such as those generated in a lightning strike). [DOC] [TLE] Electricity in the Atmosphere - The Feynman Lectures on Physics [PAR] 91The electric potential gradient of the atmosphere ... the surface of the ground 
the electric potential increases by about 100 volts per meter. .... through the air
with a speed of about 1 cm/sec in a field of 100 volts/meter, or 1 volt/cm. .... When 
a lightning bolt strikes, nine times out of ten it brings down negative charges to... [DOC] [TLE] Electric potential energy - HyperPhysics [PAR] ... k is Coulomb's constant. In electricity, it is usually more convenient to use the 
electric potential energy per unit charge, just called electric potential or voltage. [DOC] [TLE] SCIENCE: Lightning [PAR] Jul 18, 2010 ... Lightning, form of visible electric discharge between rain clouds or between a ... a 
sufficiently high valueabout 10,000 volts (V) per centimeter (cm) or about 
25,000 V/in. (a volt is a measure of electrical potential; for comparison, the ... mi) 
wide that occur about 100 km (about 60 mi) above the cloud tops. [DOC] [TLE] Atmospheric Electricity | MalagaBay [PAR] May 13, 2015 ... The chapter on Atmospheric Electricity in this standard work is especially ... The 
vertical potential gradient near the surface of the earth, due to the total ... If the 
surface gradient is 100 volts per meter, it may be 25 volts per meter at ... rate of 
precipitation and charge, usually positive, per cubic centimeter, say,... [DOC] [TLE] Potential of electric field of the Earth's atmosphere [PAR] Jan 31, 2016 ... Potential of electric field of the Earth's atmosphere ... During good weather for 
static electric field of the atmosphere is about 150 volts per meter (V/m) ... Since 
each meter is 150 volts, then the growth of 170 cm on the top surface is .... Once 
the lightning strikes the ground, the negative charge flows to the... [DOC] [TLE] World Book Student | Print - World Book Online [PAR] A lightning discharge that strikes the ground can be several kilometers long ... 
Thus, a battery has a potential difference (difference in electrical potential .... 
Under some circumstances, the threshold may be as low as 10,000 volts per 
centimeter. .... to extend above the tops of storm clouds up to about 50 kilometers 
(30 miles)... [DOC] [TLE] principle of "thundering & lightening "? | Yahoo Answers [PAR] (a volt is a measure of electrical potential; for comparison, the potential .... It 
occurs when the stepped leader forms at the positively charged cloud tops, with 
... energetic electrons having enhanced mean free paths of tens of centimeters. ... 
Cosmic rays of sufficient energy strike the atmosphere on average only once per 
50... [DOC] [TLE] What are Lichtenberg Figures, and how are they Made? [PAR] Oct 14, 2016 ... (Sculpture size: 3 x 3 x 2 inches or 7.6 x 7.6 x 5 cm) .... critical information about 
the electrical characteristics of lightning strikes. .... dramatically increases, 
reaching several million volts per centimeter. ... Prior to discharging, the 
estimated potential of these internal charge planes was about 2.5 million volts. [DOC] [TLE] Thunderstorm - Science in Context - Gale [PAR] As long as the atmosphere remains unstable, an air parcel will continue to rise. 
.... water droplets or ice crystals are blown upward by

Question: It strikes when electric potential in the atmosphere tops 10,000 volts per centimeter
Answer: Lightning