Electromagnetic Induction

What is the unit of magnetic flux?

• Henry

• Joule

• Tesla

• Weber

What is the purpose of Lenz's law?

• To oppose the change in magnetic flux

• To create a magnetic field

• To reduce the induced current

• To amplify the induced current

What happens when a conductor cuts across lines of magnetic flux?

• Conductor becomes magnetic

• Conductor heats up

• Induced current in the conductor

• No effect on the conductor

What is the direction of the induced current according to Lenz's law?

• Same as the change in magnetic flux

• Opposite to the change in magnetic flux

• Perpendicular to the change in magnetic flux

• Random direction

What is the SI unit of magnetic flux linkage?

• Henry

• Joule

• Weber

• Tesla

How is e.m.f induced in a circuit according to Faraday's law?

• By changing the resistance of the circuit

• By changing the area of the circuit

• By changing the magnetic flux linking the circuit

• By changing the temperature of the circuit

What is the effect of a coil rotating in a magnetic field?

• Increases the resistance of the coil

• Reduces the magnetic field

• Induces e.m.f in the coil

• No effect on the coil

What is electromagnetic induction?

• The process of creating light with electricity

• The process of creating heat with electricity

• The process of creating electricity by changing a magnetic field

• The process of creating sound with electricity

What is the basic idea behind electromagnetic induction?

• When a wire moves through magnetic field lines, it generates electricity

• When a wire moves through electric field lines, it generates magnetism

• When a wire moves through light waves, it generates electricity

• When a wire moves through sound waves, it generates electricity

Lenz' Law is used to determine the ________________.

• Magnitude

• Direction

• Charge

• Power