Electromagnetic Induction

____________law states that the direction of the induced current is such that it magnetic field always _______ ___ the change producing it.

• Lenz's Law, oppose

• Faraday's Law, oppose

• Lez's Law, follow

• Faraday's Law, follow

Faraday’s Law states that the magnitude of the induced e.m.f. is _________________ to the rate of change of magnetic flux linkage with the solenoid.

• equal

• inversely proportional

• directly proportional

If a magnet is pushed into a coil, voltage is induced across the coil. If the same magnet is pushed into a coil with twice the number of loops,

• half as much voltage is induced

• the same voltage is induced

• twice as much voltage is induced

• four times as much voltage is induced

Electromagnetic induction occurs in a coil when there is a change in

• electric field in the coil

• magnetic field in the coil

• voltage in the coil

A permanent magnet is quickly introduced into the center of an aluminum closed ring. Why will happen to the aluminum ring?

• The aluminum ring will be repelled by the permanent magnet.
• The aluminum ring will absorb the permanent magnet.
• The aluminum ring will remain unaffected by the permanent magnet.
• The aluminum ring will attract the permanent magnet.

Which action will increase the deflection of the galvanometer pointer?

• The magnetic pole is reversed

• The number of turns of coils is increased

• The coil is made from insulated wire

• The magnet is slowly pushed into the coil

The voltmeter is at 0 in this image. How would you manipulate the experiment to create electricity (measured in volts)?

• Flip the magnet around so the North pole is facing out
• Move the magnet back and forth
• Take the magnet out
• Add more coils around the paper cylinder

In which direction is the magnet moving in order to create the induced current as shown in the diagram.

The magnet is moving in the direction of _____

In what direction is the magnet moving to generate the induced current in the coil as shown ?

• Left
• Right
• Up
• Down

The scenario shown induces a voltage of magnitude V. If the magnet has twice the magnetic field but its motion stopped, how would the induced voltage change?

• Voltage would be twice as large in the same direction.

• Voltage would be half as large in the same direction.

• Voltage would be twice as large in the opposite direction.

• No voltage would be induced in the coil.