Question

which is an example of current electricity?

a. a person’s hair stands up as a wool hat is pulled off.

b. a child rubs a balloon against the carpet and then sticks it to a wall.

c. negatively charged particles are repelled by other negatively charged particles.

d. a battery provides electrical energy to power a phone.

Explanation:

• Option A: Hair standing up with hat removal is static electricity (charge buildup, no current flow).
• Option B: Balloon sticking to wall is static (charge transfer, no sustained current).
• Option C: Describes charge interaction (static concept, not current electricity).
• Option D: A battery powers a phone by providing a flow of electric current (current electricity involves moving charges to do work, like powering a device).

Answer:

D. A battery provides electrical energy to power a phone.