A glass rod is rubbed with a piece of silk. During the process the glass rod acq

Question

A glass rod is rubbed with a piece of silk. During the process the glass rod acquires a positive charge and the silk could either be positively charged or negatively charged. It depends on how hard the rod was rubbed. acquires a positive charge also. remains neutral. acquires a negative charge. An electron and a proton are separated by a distance of 1 m. What happens to the size of the force on the proton if the electron is moved 0.5 m closer to the proton? It increases to 2 times its original value. It increases to 8 times its original value. It increases to 4 times its original value. It decreases to one-half its original value. It decreases to one-fourth its original value.

Explanation / Answer

2. Glass rod acquires positive charge due to electron move from glass rod to silk piece,So silk acquires a negative charge. D is correct.

3. F = kQ^2/r^2

F is inversly proportional to square of distance,So if distance is decrease by half force will increase to its 4 time of original value. C is correct.

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