Electromagnetism Quiz

Who discovered the connection between electricity and magnetism?

• Nikola Tesla

• Thomas Edison

• André-Marie Ampère

• Hans Christian Oersted

What did André-Marie Ampère discover while experimenting with wires?

• The connection between currents and magnetic fields

• The connection between electricity and magnetism

• The connection between voltage and resistance

• The connection between light and sound

What happens when two parallel wires have currents running in the same direction?

• They attract each other

• They repel each other

• They create a magnetic field

• They have no effect on each other

What is the equation for Ampère's Law?

• B = mu_0 * I

• B = mu_0 * I / A

• B = mu_0 / I

• B = mu_0 * I * A

What is the magnetic constant, mu_0, equal to?

• 8 * pi * 10^-7 N/A^2

• 2 * pi * 10^-7 N/A^2

• 6 * pi * 10^-7 N/A^2

• 4 * pi * 10^-7 N/A^2

What is the magnetic field along a circle surrounding a long straight wire?

• B = (mu_0 * I) / (2 * pi / r)

• B = (mu_0 * I) * (2 * pi / r)

• B = (mu_0 * I) * (2 * pi * r)

• B = (mu_0 * I) / (2 * pi * r)

Why do two parallel wires with currents running in opposite directions repel each other?

• The magnetic fields from the wires point in opposite directions

• The wires have opposite charges

• The magnetic fields from the wires point in the same direction

• The wires have the same charges

What is the behavior of a coil of wire when a current is running through it?

• The inside of the coil acts like a magnet

• The coil becomes electrically charged

• The coil heats up

• The coil expands

What is the equation for the magnetic field inside a solenoid?

• B = mu_0 / I / N

• B = mu_0 / I * N

• B = mu_0 * I / N

• B = mu_0 * I * N

What causes a loop of wire in a magnetic field to turn?

• The magnetic field creates a torque on the wire

• The magnetic field pushes the wire

• The wire is attracted to the magnetic field

• The wire repels the magnetic field