Electromagnetic Induction

A device that transforms electrical energy to mechanical energy is a

• generator

• motor

• transformer

• magnet

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NGSS.HS-PS3-3

A device that transforms mechanical energy to electrical energy is a

• generator

• motor

• transformer

• magnet

Tags

NGSS.HS-PS3-3

A transformer actually transforms

• voltage

• magnetic field lines

• generators into motors

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NGSS.HS-PS2-5

NGSS.HS-PS3-3

A step-up transformer increases

• power

• energy

• neither

• both

The source of all magnetism is

• tiny pieces of iron

• tiny domains of aligned atoms

• moving electric charge

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NGSS.HS-PS2-5

NGSS.HS-PS3-5

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

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

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

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NGSS.HS-PS2-5

What would happen if you broke a bar magnet into 8 pieces?

• You would have 8 half magnets

• You would have 4 complete magnets

• You would have 8 complete magnets

• They wouldn't be magnets anymore

Voltage can be induced in a wire by

• moving the wire near a magnet

• moving a magnet near the wire

• changing the current in a nearby wire

• all of these

• none of these

Tags

NGSS.HS-PS2-5

This picture shows a turbine generator used to produce electricity at a geothermal power plant.
Electricity is produced by using steam to _____________.

• heat the turbine generators
• spin the turbine generators 
• reduce friction in the turbine generators
• reduce emissions from the turbine generators

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NGSS.HS-PS3-4