Question

At one time it was thought that electric charge was a weightless fluid. An excess of this fluid resulted in a positive charge; a deficiency resulted in a negative charge. Describe at least one experiment for which this hypothesis provides a satisfactory explanation.

Check all that apply.

Check all that apply.

	If you rub a balloon with a wool scarf, the balloon and the scarf attract.
	Two balloons rubbed by a wool scarf repel − they have a like charge.
	A positively charged metal ball A is placed near an uncharged metal ball B, the ball A and the ball B attract.
	A positively charged metal ball A is placed near an uncharged dielectric ball B, the ball A and the ball B attract.

Show the difference between charged objects and magnets:

-can be positive or negative

-attracts or repels a non-metallic magnet

-does not attract or repel a charged object

-always has two poles: the north and the south

-attracts or repels a charged object

Answer 1

Answers :

At one time it was thought that electric charge was a weightless fluid. An excess of this fluid resulted in a positive charge; a deficiency resulted in a negative charge. The following experiment provides a satisfactory explanation for this hypothesis :

• If you rub a balloon with a wool scarf, the balloon and the scarf attract.
• Two balloons rubbed by a wool scarf repel − they have a like charge.

how the difference between charged objects and magnets :

Charge Particle :

• can be positive or negative
• attracts or repels a charged object

Magnets :

• attracts or repels a non-metallic magnet
• does not attract or repel a charged object
• always has two poles: the north and the south