Electric Fields: Crash Course Physics #26

What is an electric field?

• A type of energy that powers homes.

• A measurable effect created by any charged object.

• The force between two charged particles.

• A special kind of light.

How do electric field lines behave around a negatively charged object?

• They point outwards from the object.

• They point inwards towards the object.

• They form circles around the object.

• They do not exist around negative charges.

What does it mean if electric field lines are drawn very close together in a certain area?

• The electric field is weak in that area.

• There are no charged objects nearby.

• The electric field is strong in that area.

• The charged objects are moving quickly.

Where do electric field lines typically begin and end?

• They begin on negatively charged objects and end on positively charged objects.

• They always form closed loops.

• They begin on positively charged objects and end on negatively charged objects.

• They can start and end anywhere.

Which of these is a rule for electric field lines?

• They can cross each other.

• They always start at negative charges.

• They must never cross each other.

• They only exist around negative charges.

In an electric field, which way do positive test charges move?

• Towards positive charges.

• Away from negative charges.

• Towards negative charges.

• They do not move.

What is a capacitor used for?

• To make things hotter.

• To store electric charge.

• To block electric fields.

• To create light.

What happens to the electric field inside a conductor when it is in electrostatic equilibrium?

• It becomes very strong.

• It becomes zero.

• It changes direction constantly.

• It moves to the center.