Lesson 6.5

Electric charges must (a)   in order to create an observable magnetic field.

• exist
• be moving
• be stationary
• disappear

Answer explanation

This question links to success criteria: I can describe the relationship between a changing magnetic field and electric current.

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What must occur for a magnetic field to induce an electric current?

• The magnetic field must be really big

• The magnetic field must be stable

• The magnetic field must be changing

• The magnetic field must be from a permanent magnet

Answer explanation

This question links to success criteria: I can describe the relationship between a changing magnetic field and electric current.

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A device that transforms mechanical energy to electrical energy is a

• generator

• motor

• transformer

• magnet

Answer explanation

This question links to success criteria: I can explain how an electric generator produces electricity.

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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

Answer explanation

This question links to success criteria: I can explain how an electric generator produces electricity.

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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

Answer explanation

This question links to success criteria: I can identify common energy sources that generate electricity through electromagnetic induction.

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This picture shows a turbine generator used to produce electricity at a hydroelectric power plant. Which of the following statements explains how electricity is produced.

• Gravity pulls the water down. The water boils and the steam turns the generator.

• Gravity pulls the water. The moving water collides with the turbine and spins the generator.

• The friction of the moving water boils the water and the rising steam carries electricity.

• The water cools down the hot generator to allow it to work longer.

Answer explanation

This question links to success criteria: I can identify common energy sources that generate electricity through electromagnetic induction.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

Match the energy source with the way it uses the turning of a generator to produce electricity through electromagnetic induction.

• Uses gravity to spin a generator

• Geothermal power

• Uses naturally occurring steam to turn a generator

• Hydroelectric Power

• Does not use electromagnetic induction

• Wind Turbine

• Uses wind to spin a generator

• Solar Panels

• Use chemical energy to boil water and turn a generator

• Oil and Natural Gas

Answer explanation

This question links to success criteria: I can identify common energy sources that generate electricity through electromagnetic induction.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

Place the following steps in order to show how a generator works from step 1 on the left to step 5 on the right.

• The charges in the wire begin to move.

• The energy in the magnetic field is transferred into the charges in the wire

• The wires experience a changing magnetic field

• The loops or wire are spun.

• Loops of wire are placed inside a permanent Magnet.

Answer explanation

This question links to success criteria: I can explain how an electric generator produces electricity.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

The ability of a changing magnetic field to create a moving charge or a moving charge to make a changing magnetic field is called

• A Faraday Cage

• The Electric Force

• Electromagnetic Induction

• Voodoo

Answer explanation

This question links to success criteria: I can describe the relationship between a changing magnetic field and electric current.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

How could the experimenter increase the amount of electricity being induced by this experiment?

• Increase the number of coils

• Decrease the number of coils

• Flip the magnet around

• Nothing, the amount of electricity cannot be increased

Answer explanation

This question links to success criteria: I can explain how an electric generator produces electricity.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.