Generators Motors and Electricity

What do you call an energy converting system that transforms electrical energy into mechanical movement?

• Electric motor

• Electric field

• Electric generator

• Electric plasma

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NGSS.HS-PS3-3

Which of the situation below shows how a basic electric motor works?

• The energy contained in the batteries of the vehicle is transformed into wheel rotation.

• Electrical energy converted into blade rotation in the food processor and cut down food.

• Both A and B

• None of these

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NGSS.HS-PS3-3

Which is the correct sequence in the operation of generator in the production of electricity in Hydroelectric Power Plant?

I. A turbine converts the kinetic energy of the falling water into mechanical energy.

II. Hydropower plants capture the energy of falling water to generate electricity.

III. Once an electrical current has been established, it is directed through copper wires to power machines and devices.

IV. The generator converts the mechanical energy from the turbine into electrical energy.

• I,IV, II, III

• II,I,IV, III

• IV, I, III, II

• III, II, IV, I

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NGSS.HS-PS3-3

He was credited for discovering that electric currents create magnetic fields, which was the first connection found between electricity and magnetism.

• James Maxwell

• Hans Christian Orsted

• Michael Faraday

• Alessandro Volta

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NGSS.HS-PS2-5

What will happen to the coiled wire in a model of an electric motor if the magnetic poles are repulsed and attracted?

• The coil remains stable.

• 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.

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NGSS.HS-PS2-5

NGSS.HS-PS3-5

What are the three basic parts of an electric generator?

• communicator, stator, and motor shaft

• armature, brushes, and battery

• stator, rotor, and commutator

• battery, armature, and DC power supply

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NGSS.HS-PS2-5

NGSS.HS-PS3-3

Which of these is the commutator function in the generator?

• Acts as a rectifier that converts AC voltage to DC voltage within the winding of the armature.

• Diminish the energy loss caused by Eddy Current.

• Offer magnetic fields where the coil is rotating.

• Provides electricity to the generator.

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NGSS.HS-PS2-5

What do you call a device that generates electrical current when a wire coil is wrapped around an iron core and rotated close to a magnet?

• car

• magnet

• motor

• generator

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NGSS.HS-PS2-5

NGSS.HS-PS3-5

Which is NOT a distinctive attribute of an electrical generator?

• Electric generator turns mechanical energy into electric energy

• Electric generator turns electric power into mechanical energy.

• It provides electricity

• It is based upon the electromagnetic induction theory

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NGSS.HS-PS3-3

NGSS.HS-PS3-5

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

• Motor

• Pipe

• Turbine

• Magnet

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NGSS.HS-PS3-3