When an ebonite rod is rubbed with silk, the charge acquired by the rod is
Fill in the blanks.
(a) The charge on an ebonite rod is ………… .
(b) When glass and silk are rubbed on each other, the glass develops a ………… charge and the silk a ………… one.
(c) Friction causes the transfer of ………… particles.
When a glass rod is rubbed with a piece of silk cloth, then :
(a) the glass rod and silk cloth both acquire the positive charge.
(b) the glass rod becomes positively charged while the silk cloth has a negative charge.
(c) the glass rod and silk cloth both acquire the negative charge.
(d) the glass rod becomes negatively charged while the silk cloth has a positive charge.