SP025 Electromagnetic Induction

Electromagnetic induction is change in ___________________. 

• surface area
• magnetic poles
• magnetic flux

What would happen if I move a bar magnet in and out of a coil of copper wire?

• Electric current would disappear 
• The magnet would explode 
• Electric current will flow through the wire
• It would produce a gravitational field

A magnet can move in a coil of wire to produce electricity in which system?

• Generator
• Motor
• Magnet
• Transformer

___ Law says that the Induced current is proportional to the change of magnetic flux 

• Lenz'
• Faraday's
• Ampere's

Which description best applies to Lenz's Law?

• An induced current occurs when a magnet passes through a tube.

• When a change in magnetic field occurs to a coil the direction of current goes in the in the other direction to this change.

• The direction of an induced current is such to align with the change that created it.

• A magnet is a tube is always slowed by its magnetic field.

Which activity will produce the highest current?

• Move the magnet bar into the coil while the coil remains stationery

• Move the coil into the magnet bar while the magnet remains stationery

• Move the coil and magnet towards each other

• Move the coil and magnet away from each other

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 unit of magnetic flux is the

• Henry
• Tesla
• Faraday
• Weber

How would flipping the magnet in this experiment change the current?

• The current would not change
• The current would go to the right
• There would be no current
• The current would go CRAZY

Which activity will produce the highest current?

• Move the magnet bar into the coil while the coil remains stationery

• Move the coil into the magnet bar while the magnet remains stationery

• Move the coil and magnet towards each other

• Move the coil and magnet away from each other