When an ebonite rod is rubbed with fur, the fur transfers electrons to the ebonite rod. Why?

If an ebonite rod is rubbed with fur it

When an ebonite rod is rubbed with fur, the charge acquired by the fur is.

What happens when an ebonite rod is rubbed with wool ?

when a glass rod is rubbed with silk cloth, both get charged.

Figure shows a metal rod PQ resting on the smooth rails AB and positioned between the poles of a permanent magnet. The rails, the rod and the magnetic field are in three mutually perpendicular directions. A galvonometer G connects the rails through a switch K. Length of rod = 15 cm, B = 0.50 T, resistance of the closed loop containing the rod = 9.0mOmega . Assume the field to be uniform. a. Suppose K is open and the rod is moved with a speed of 12cms^(-1) in the direction shown. Give the polarity and magnitude of the induced emf. b. Is there an excess charge built up at the ends of the rods when K is open? What if K is closed? c. With K open and the rod moving uniformly, there is no net force on the electrons in the rod PQ eventhough they do experience magnetic force due to the motion of the rod. Explain. d. What is the retarding force on the rod when K is closed? e. How much power is required (by an external agent) to keep the rod moving at the same speed (=12cms^(-1)) when K is closed? How much power is required when K is open? f. How much power is dissipated as heat in the closed circuit? What is the source of this power? g. What is the induced emf in the moving rod if the magnetic field is parallel to the rails instead of being perpendicular?

When a unifrom rod is heated which of the following quantity of the rod will increase

When a glass rod is rubbed with a silk cloth, changes 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 charger.

The charge acquired by an ebonite rod rubbed with a piece of flannel is negative.