Unit 15 Test - Electric Fields -

In solid conductors, electric current is the flow of

• electrons.
• negative ions.
• protons.

The purpose of using a positive test charge is to

(a)  

• determine the strength of an electron
• determine the direction of an electon
• both

The electrical resistance in a thick wire is (a)   compared to a thin wire.

• less
• the same 
• more 

An electric field has

• direction.
• magnitude.
• both

The electric force and the gravitational force are the result of (a)  

• charged objects.
• force fields.
• black holes.

The direction of electric field lines shows the (a)  

• direction of the force on a positive test charge
• size of the field.
• strength of the field.

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

• momentum.
• amount of charge
• amount of mass.

If two negative charges are held close together and then released, the charges will (a)  

• accelerate toward each other.
• accelerate away from each other.
• not move.

A volt is a unit of

(a)  

• electric potential.
• energy.
• work.

The electric field outside a charged spherical dome may be enormous, while inside the spherical dome, the electric field is

• even more enormous.
• almost as enormous.
• zero.