Electricity and Magnetism Quiz

What is an electric field?

• A type of force that only affects neutral objects

• A region of space where no force is exerted

• A type of visible force that attracts objects

• A region of space around a charged object where a force is exerted on any other charged object

What produces electric fields?

• Electric charges (positive or negative)

• Magnetic fields

• Gravity

• Light waves

What is the direction of the electric field created by a positive charge?

• Circular

• Inward-pointing

• No direction

• Outward-pointing

What is the smallest unit of charge?

• Charge of a proton

• Charge of a neutron

• Charge of a photon

• Charge of an electron

According to Coulomb's Law, what happens when like charges are brought close together?

• They create a magnetic field

• They cancel each other out

• They attract each other

• They repel each other

What is the formula for the electric field due to a point charge?

• E = k * Q / r^2

• E = k * Q * r^2

• E = k / Q / r^2

• E = k / Q * r^2

What is an electric dipole?

• A pair of equal and opposite charges separated by a small distance

• A single charge with no separation

• A charge with infinite distance

• A charge with no magnitude

How does a charged particle move in an electric field if it is initially at rest?

• Accelerates uniformly in the direction of the force

• Moves in a circular path

• Moves in a random direction

• Stays stationary

What does Gauss's Law relate?

• The distribution of magnetic charge to the resulting magnetic field

• The distribution of light to the resulting shadow

• The distribution of electric charge to the resulting electric field

• The distribution of sound to the resulting vibration

What is the net electric flux through any closed surface according to Gauss's Law?

• Equal to the charge density

• Equal to zero

• Equal to the net electric charge enclosed by the surface, divided by the permittivity of free space

• Equal to the surface area of the closed surface