Electric Force

By convention, the direction of an electric field at any point in space is that of the direction on a ______ charge.

• positive

• negative

• all of these choices

• neutral

In this diagram, which plate is positively charged?

• The top plate

• neither are positive

• The bottom plate

• both are positive

Electrical forces are measured in what unit?

• pounds

• kilograms

• Newton

• Coulombs

The strength of an electric field is measured in what unit?

• Coulombs

• All of these choices are correct

• Newtons

• Newtons per Coulomb

Negative charges accelerate in what direction in an electric field?

• downward

• opposite to the direction of the field

• in the direction of the field

• perpendicular to the field lines

If we compare electric fields to gravitational fields, where F is force, then q (the amount of charge on an object) is analogous to:

• the weight of an object

• the mass of the earth

• the acceleration of a falling object

• mass of a falling object

If we compare electric fields to gravitational fields, where F is force, then E (the strength of the field) is analogous to:

• g (gravitational acceleration)

• the mass of the object

• the size of the object

• the mass of the earth