Electric Charge...

Two uncharged bodies on rubbing, get charged due to:

What do you understand by the static or frictional electricity ?

5 charges each of magnitude $$10^{-5}$$ C and mass 1 kg are place (fixed) symmetrically about a movable central charge of magnitude $$5 \times 10^{-5} C$$ and mass 0.5 kg as shown. The charge at $$P_1$$ is removed. The acceleration of the central charge is
[Given $$OP_1 = OP_2 = OP_3 = OP_4 = OP_5=1m; \displaystyle \frac{1}{4 \pi \varepsilon _0 } = 9 \times 10^9$$ in SI Units]

An electron of mass m. initially at rest takes time $$t_1$$ to move a distances in a uniform electric field in the same field environment, a proton of mass mp initially at rest takes time $$t_2$$ to move the same distance (in the opposite direction). Ignoring gravity, the ratio $$t_2/t_1$$ is

Two charges are placed at certain distance apart. A metallic sheet is placed between them. What will happen to the force between the charges?

An inflated balloon was pressed against a wall after it has been rubbed with a piece of synthetic cloth. It was found that the balloon sticks to the wall. What force might be responsible for the attraction between the balloon and the wall?

When we remove polyester or woollen cloth in dark, we can see sparkand hear a cracking sound. These are due to:

If two bodies A and B (A bigger in size than B) are rubbed together, then :

The adjoining figure shows a negatively charged electroscope. If a negatively charged rod is brought close to, but not touching, the knob, the two leaves will :

12 positive charges of magnitude q are placed on a circle of radius R in a manner that they are equally spaced. A charge +Q is placed at the centre. If one of the charges q is removed, then the force on Q is