Electromagnetic induction

What is another name for the generator effect?

• Magnetic resistance

• Electromagnetic induction

• Electric displacement

What causes the potential difference to be induced in the wire?

• The temperature of the wire

• The strength of the electric current

• The movement of the wire through a magnetic field

• The length of the wire

What happens to the potential difference when the wire stops moving?

• The potential difference disappears

• The potential difference increases

• The potential difference remains the same

• The potential difference doubles

What happens to the direction of the potential difference when the direction of the wire movement changes?

• The direction of the potential difference remains the same.

• The potential difference disappears

• The potential difference increases

• The direction of the potential difference swaps

What is necessary to generate a current in addition to a potential difference?

• The wire must be insulated

• The ends of the wire must be connected to form a circuit

• The magnetic field must be constant

• The wire must be stationary

What happens if the wire remains still and the magnets move instead?

• A potential difference is still induced

• No potential difference is induced

• The magnetic field collapses

• The potential difference decreases

What is the way to increase the size of the induced potential difference?

• Decrease the size of the wire

• Increase magnetic field strength.

• Move the wire faster.

• Add more turns to the coil

• Move the magnets faster.

How can you change the direction of the current in the wire?

• By changing the direction of the magnet.

• By increasing the temperature

• By swapping its poles.

• By adding more turns to the coil