A student carries out an investigation into electrostatic charge using a balloon and a cloth. At the start, neither the balloon nor the cloth has any charge. The student then rubs the balloon with the cloth. As a result, the balloon acquires a negative charge of magnitude Q. The cloth also becomes charged, and a force acts between the balloon and the cloth. Which row gives the correct magnitude and sign of the charge on the cloth, together with the type of force between the balloon and the cloth?
- Amagnitude of charge on cloth: equal to Q; sign of charge on cloth: positive; type of force: attraction
- Bmagnitude of charge on cloth: equal to Q; sign of charge on cloth: negative; type of force: repulsion
- Cmagnitude of charge on cloth: greater than Q; sign of charge on cloth: positive; type of force: repulsion
- Dmagnitude of charge on cloth: greater than Q; sign of charge on cloth: negative; type of force: attraction