Lesson 2: D1: Modeling Electric and Magnetic Fields

What are the two forms of electromagnetism?

• Magnetic force and nuclear force

• Electricity and light

• Electrostatic force and gravitational force

• Electrostatic force and magnetic force

What is the effect of opposite charges on objects?

• They have no effect on each other

• They neutralize each other

• They repel each other

• They attract each other

How does the distance between charged objects affect the force between them?

• The force decreases with distance

• Distance has no effect on the force

• The force remains constant

• The force increases with distance

Why is electrostatic force called 'static'?

• Because it involves stationary charges

• Because it can only occur in solid objects

• Because it doesn't involve movement

• Because it can build up in an object

What happens when a balloon is rubbed on a wool sweater?

• The balloon becomes negatively charged

• The balloon loses electrons

• The sweater becomes negatively charged

• Both objects remain neutral

What is the primary cause of lightning?

• Magnetic fields in clouds

• Electrostatic force build-up in rain clouds

• High temperature in clouds

• Movement of protons in the sky

What role do electrons play in electricity?

• They move from a positive to a negative place

• They remain stationary

• They move from a negative to a positive place

• They create a magnetic field