Lectures on Physics - Volume II - Richard Feynman

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We have said that the electrical force, like a gravitational force, decreases inversely as the square of the distance between charges. This relationship is called Coulomb's law. But it is not precisely true when charges are moving - the electrical forces depend also on the motions of the charges in a complicated way. One part of the force between moving charges we call the magnetic force. It is really one aspect of an electrical effect. That is why we call the subject "electromagnetism."

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नाम WPM सट्टाई
eventlogging 170.00 100%
ilovejujubee 124.30 98.0%
wolfram 122.90 93.4%
hjing 116.31 97.6%
tylerchatwood 114.10 98.0%
sammich 113.81 96.1%
user266672 112.70 96.7%
jpadtyping 110.40 96.7%
heiga 109.92 98.4%
skidmark 109.52 99.4%

हालका लागि

नाम WPM सट्टाई
cristalyn 32.99 96.3%
yeamen 58.80 89.6%
gguglielmii 41.59 94.1%
user67176 62.42 93.9%
annaogi 53.30 92.0%
user321363 54.66 93.5%
vasanth_lpm 33.19 94.4%
user97523 79.60 95.5%