Uniform electric fields

An electric field is a region where a _____ experiences a force.

• mass

• magnet

• particle

• charge

The electric field between two parallel metal plates that are charged oppositely is _________. (Select all)

• uniform

• non-uniform

• changing

• constant

A proton placed in a uniform electric field experiences a force F. What is the force experienced by an α-particle placed in the same field?

• F/2

• F

• 2F

• 4F

What is the field strength of the electric field between the plates?

• 1 V cm⁻¹

• 2 V cm⁻¹

• 4 V cm⁻¹

• 8 V cm⁻¹

A charged particle moving in an electric field of strength 15 kN C⁻¹ has an acceleration of 8.55×10⁻⁸ m s⁻². What is the charge-to-mass ratio of the particle?

• 1.3 × 10⁻³ C kg⁻¹

• 5.7 × 10⁻¹² C kg⁻¹

• 1.3 × 10⁻⁶ C kg⁻¹

• 5.7 × 10⁻⁹ C kg⁻¹

Which particle would deflect by the largest angle when it enters at right angles into a uniform electric field?

• a proton with a speed of v

• a proton with a speed 10v

• an electron with a speed of v

• an electron with a speed of 10v