Explanation:
Coulomb force is a strong force. It can be shown that the Coulomb force between two electrons is 1043 times than gravitational force. All the other options are basic properties of Coulomb’s Law.
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The antenna current of an AM transmitter is 8 A when only carrier is sent but increases to 8.96 A when the carrier is sinusoidally modulated. The percentage modulation is
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(a) 50% |
(b) 60% |
(c) 65% |
(d) 71% |
During the nuclear fusion reaction
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(a) A heavy nucleus breaks into two fragments by itself |
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(b) A light nucleus bombarded by thermal neutrons breaks up |
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(c) A heavy nucleus bombarded by thermal neutrons breaks up |
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(d) Two light nuclei combine to give a heavier nucleus and possibly other products |
At what distance from a convex lens of focal length 30 cm, an object should be placed so that the size of the image be 1/2 of the object
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(a) 30 cm |
(b) 60 cm |
(c) 15 cm |
(d) 90 cm |