DA EVERYTHING Flashcards

1
Q

It is easy to be transferred over longer distances without much energy loss.

A

Alternating current

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2
Q

It can cause the change in direction of electric flow.

A

rotating magnets

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3
Q

What is the frequency of AC?

A

50 Hz or 60 Hz

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4
Q

What is the flow of current in AC?

A

Forward-backward periodically

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5
Q

It cannot be transferred over a very long distance.

A

Direct current

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6
Q

Direct current does not lose power. True or False?

A

False

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7
Q

It makes DC flow in a single direction.

A

Steady magnetism

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8
Q

DC flows in a _______________________.

A

single direction steadily

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9
Q

More solenoids, _________________.

A

stronger magnetism

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10
Q

A physical phenomenon produced by the motion of electric charge.

A

Magnetism

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11
Q

uses electromagnet to change electrical energy into mechanical energy.

A

Electric motor

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12
Q

Has all the same parts and an electric motor but does the exact opposite of a motor.

A

Generator

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13
Q

The switch in an electric motor that reverses the flow of current.

A

commutator

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14
Q

In a direct current, electrons move in a _____________ direction around the circuit, travelling from the _________ side of the power supply.

A

constant, opposite

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15
Q

It uses an electrolyte in the form of paste that does not leak; commonly used for portable devices.

A

Dry cell

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16
Q

An electromagnet is created when a wire is ____________, and an ____________ current flows through it. Generally, electromagnets have a _________ core that helps to increase the strength of the electromagnet. Magnetic force is created by the movement of ____________ charges through a wire.

A

coiled, electric, metal, electrical

17
Q
A