- 1(current)
Q. No.Two identical balls of cork \(\mathrm{(C_1,C_2)}\) are charged oppositely with equal amounts of charge distributed uniformly over their respective surfaces. Two similar (of same size) balls of copper\((M_1,M_2)\) are charged in the same way as the previous two balls. \(\mathrm{C_1,C_2}\) are allowed to touch each other briefly and are separated, and the same is done with \(M_1,M_2.\) The electrostatic force between \(\mathrm{C_1,C_2}\) is \(F_C\) and that between \(M_1,M_2\) is \(F_M\) at the same separation. Then:
| 1. | \(F_C=0,F_M\neq0\) | 2. | \(F_C\neq0,F_M=0\) |
| 3. | \(F_C=0,F_M=0\) | 4. | \(F_C\neq0,F_M\neq0\) |
Subtopic: Â Electric Charge |
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A conductor is connected to the earth electrically; a positive point charge is brought near it while it remains earthed.
The earth connection is broken and then the positive charge is taken away. The final charge on the conductor is:
| 1. | zero | 2. | positive |
| 3. | negative | 4. | unpredictable |
Subtopic: Â Electric Charge |
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- 1(current)
Q. No.
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