Question

1. suppose you want to make the demonstration more dramatic by attracting as much hair as possible with the balloon. which of the following is the best choice to accomplish your goal? a. decrease the electric force by holding the balloon closer to the hair. b. increase the electric force by rubbing the balloon for a longer period of time. c. decrease the electric force by using a larger balloon. d. increase the electric force by holding the balloon farther away from the hair.

Explanation:

Step1: Understand electric - force concept

The electric force between the charged balloon and hair is related to the charge on the balloon. Rubbing the balloon for a longer time transfers more electrons, increasing its charge.

Step2: Analyze each option

• Option A: Holding the balloon closer decreases distance but not electric - force generation.
• Option B: Rubbing longer increases charge, thus increasing electric force and attracting more hair.
• Option C: Larger balloon doesn't necessarily mean more charge or electric force.
• Option D: Holding farther away decreases electric force.

Answer:

B. Increase the electric force by rubbing the balloon for a longer period of time.