What type of charges are obtained on silk cloth and glass rod ?

When a conducting soap bubble is negatively charged then

Mention the $SI$ unit and value of fundamental charge. Write its smaller units.

Mention types of methods of charging the body.

A girl brings a positively charged rod near a thin neutral stream of water from a tap. She observes that the water stream bends towards her. Instead, if she were to bring a negatively charged rod near to the stream, it will

Which scientist represented the types of charges ?