A piece of paper wrapped tightly on a wooden rod is found to get charged quickly when held over a flame compared to a similar piece of paper when wrapped on brass rod . Explain why ?

When a charged comb is brought near a small piece of paper, it attracts. Does the paper become charged before being attracted?

Two insulated rods A and Bare oppositely charged on their ends. They are mounted at the centres, so that they are free to rotate and then held in the position shown in the figure, in a view from above. The rods rotate in the plane of the paper. Will the rods stay in those positions when released? If not, then what position(s) will they move? Will their final! configuration(s) be stable?

When a glass rod is rubbed with a silk cloth, charges appear on both. A similar phenomenon is observed with many other pairs of bodies. Explain, how this observation is consistent with the law of conservation of charge?