Electric Fields

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100

Find the magnitude of the electric field for a charge of 5.6 nC at a distance of 3.0 m.

5.6 N/C

200

If Eo is the Electric Field generated at a distance r from a charge Q, what is the Electric Field at a distance 2r?

(1/4)Eo

300

A free electron and a free proton in the same electric field experience forces of equal magnitude but opposite directions.

True

400

Replacing a +3 µC test charge with a –3 µC test charge changes the electric field at point P.

False

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100

A 4.5 mC charge experiences an electrical force of 9.0 mN in the presence of an electric field.  What is the magnitude of the electric field?

2.0 N/C

200

An electric charge Q is placed at the origin.  If the magnitude of the electric field at point A is E, what is the electric field at point D where distance is quadrupled?

E/16

300

The electron’s acceleration is greater in magnitude than the proton’s acceleration.

True

400

Gravitational attraction between the electron and the nucleus is the main force that keeps the atom together.

False