Electric Charges and Fields
1Q. 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.
2Q. An electrostatic field line is a continuous curve. That is, a field line cannothave sudden breaks. Why not?
3Q. Explain why two field lines never cross each other at any point?
4Q. A point charge causes an electric flux of -1.0 ×103 Nm2/C to pass through a spherical Gaussian surface of 10.0 cm radius centered on the charge.If the radius of the Gaussian surface were doubled, how much flux would pass through the surface?
5Q. A polythene piece rubbed with wool is found to have a negative charge of 3× 10-7 C. Is there a transfer of mass from wool to polythene?