point a glass rod and a silk cloth are neutral The glass rod is rubbed with the silk cloth, and acquires a charge of -2C What is the charge on the silk cloth There is no way of knowing the charge the silk cloth +2C -2C

When a glass rod is rubbed with a silk cloth, the glass rod acquires a negative charge and the silk cloth acquires an equal and opposite positive charge due to the transfer of electrons from the glass to the silk.<br /><br />Given that the glass rod acquires a charge of $-2C$, the charge on the silk cloth will be $+2C$.<br /><br />Therefore, the correct answer is $+2C$.