Quiz 4-Physics

Which of the following principles explains how an electric motors works?

• magnetic force

• magnetism

• electromagnetic induction

• electromagnetism

Which is NOT a distinguishing feature of an electric generator?

• It is based on the principle of electromagnetic induction.

• It generates electricity.

• Electric generator converts electrical energy into mechanical energy.

• Electric generator converts mechanical energy into electrical.

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What do we call a device that converts electricity into mechanical movement?

• electric charge

• electric motor

• electric current

• electric generator

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What do you call a device that converts mechanical movement into electricity?

• electric field

• electric generator

• electric plasma

• electric motor

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Which of the following situations illustrate how a simple electric motor works?

• The mechanical stored in the car’s batteries is converted into the rotation of the wheels.

• Electrical energy turned into rotation of the blades in the food processor and cut up food.

• Chemical energy turned into rotation of the blades in the food processor and cut up food.

• None of these

Which of the following is a device that converts electrical energy into mechanical energy?

• vacuum cleaner

• bicycle

• weighing scale

• all of the above

What two forces are required for generators and electric motors to work?

• magnetic and thermal

• electric and thermal

• electric and magnetic

• magnetic and radiant

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What would happen to the coiled wire in an electric motor model if there is a repulsion and attraction of the magnetic poles?

• The coil fluctuates and converts electrical energy into chemical energy.

• The coil stops and changes mechanical energy into electrical energy.

• The coil rotates and changes electrical energy into mechanical energy.

• The coil remains stable.

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What do you call a huge wheel that rotates when pushed by water, wind, or steam (associated with generators)?

• Turbine

• Magnet

• Motor

• Pipe

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What do you call a devise that produces an electric current when a coil of wire is wrapped around an iron core and rotated near a magnet?

• motor

• magnet

• rotor

• generator

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