An electric field has

• direction

• magnitude

• Both A and B

• none of the above

Every proton in the universe is surrounded by its own

• gravitational field

• electric field

• both A and B

• none of the above

The direction of electric field lines shows the

• direction of the force on a test positive charge

• size of the field

• strength of the field

• all of the above

Electrical potential energy is the energy a charged object has because of its

• momentum

• location

• mass

• motion

A small, positively charged object near a positively charged sphere is moved closer to the sphere. The electrical potential energy of the small object

When an electron is brought near a negatively charged sphere, its potential energy increases. The reason this happens is that

A volt is a unit of

• charge

• electric potential

• energy

• work

• current

How will the top plate be charged if a beam of electrons accelerates from the back of your TV set to the screen, where charged parallel plates create a vertical electric field?

• negatively

• positively

• less than zero.

• zero.

The electric field inside an uncharged metal ball is zero. If the ball gains a negative charge, the electric field inside the ball will be

• greater than zero.

• less than zero.

• zero.

• unchanged.

A 5-C charge is located near a positively charged sphere so that it has 50 J of electric potential energy. Its electric potential is

• 2 V.

• 5 V.

• 10 V.

• 20 V.