Understanding Electromagnetic Induction

What is the phenomenon called when a potential difference is created by moving a wire through a magnetic field?

• Electric displacement

• Magnetic fluctuation

• Electromagnetic induction

• Wire dynamism

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

• It increases

• It remains constant

• It disappears

• It reverses direction

What is the primary cause of the induced potential difference when the wire moves through the magnetic field?

• The gravitational pull on the wire

• The heat generated by the wire

• The electrical resistance of the wire

• The change in the magnetic field experienced by the wire

How can a current be generated in the setup described?

• By isolating the wire from the magnets

• By using a single magnet

• By keeping the wire stationary

• By forming a closed circuit

What effect does moving the magnets instead of the wire have on the potential difference?

• No potential difference is induced

• Decreases the potential difference

• Reverses the potential difference

• Induces a potential difference

What is necessary for a current to be generated in the described electromagnetic setup?

• The coil must be single-turn

• A potential difference must be present

• The magnets must be stationary

• The wire must be insulated

Which factor does not increase the induced potential difference?

• Using stronger magnets

• Decreasing the speed of movement

• Increasing the number of coil turns

• Moving the wire or magnets more quickly

What is the result of adding more turns to the coil?

• Increases the induced potential difference

• Reduces the magnetic field strength

• Decreases the resistance

• Decreases the current flow

What happens when the direction of the magnet moving into and out of the coil is changed?

• The potential difference is eliminated

• The current stops flowing

• The direction of the current changes

• The magnetic field becomes stable

How can the direction of the current be altered?

• By using a weaker magnetic field

• By swapping the poles of the magnets

• By stopping the movement of the wire

• By changing the shape of the wire