Quiz on Electromagnetic Induction

What is the first experiment conducted by Faraday related to electromagnetic induction?

• A coil is moved towards a magnet

• Galvanometer shows deflection when a key is tapped

• A coil connected to a battery produces current

• Relative motion between a bar magnet and wire loop produces current

According to Faraday's first law of induction, what is the relationship between induced emf and magnetic flux?

• Induced emf is independent of magnetic flux

• Induced emf is proportional to the square of magnetic flux

• Induced emf is inversely proportional to magnetic flux

• Induced emf is equal to the time rate of change of magnetic flux

What does Lenz's law state about the direction of induced emf?

• It opposes the change in magnetic flux that produced it

• It enhances the change in magnetic flux

• It is always in the same direction as the magnetic field

• It has no relation to magnetic flux

Which of the following is a practical application of eddy currents?

• Solar panel

• Battery charger

• Electric motor

• Induction furnace

What is the SI unit of self-inductance?

• Tesla

• Farad

• Henry

• Ohm

In the context of mutual inductance, what does the coefficient M represent?

• The mutual inductance between two coils

• The resistance of the coils

• The induced emf in the second coil

• The rate of change of current

How does the self-inductance of a solenoid change when filled with a material of higher permeability?

• It becomes zero

• It decreases

• It remains the same

• It increases

What is the formula for the induced emf in a coil with N turns according to Faraday's law?

• ε = -N(dI/dt)

• ε = N(dI/dt)

• ε = N(dφ/dt)

• ε = -N(dφ/dt)

What is the primary function of an AC generator?

• To convert electric energy into mechanical energy

• To convert mechanical energy into electric energy

• To store electric energy

• To increase voltage

According to Fleming's right-hand rule, which finger represents the direction of induced current?

• Palm

• Thumb

• Central finger

• Forefinger