Transmission and Distribution of electricity

Transmission and Distribution of electricity

Assessment

Assessment

Created by

Wei Ming Kang

Science

3rd Grade

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10 questions

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1.

Multiple Choice

45 sec

1 pt

Why is alternating current used instead of direct current in the transmission of electricity through long distances?

Only alternating current can flow through the cables.

Alternating current voltage can be stepped up or stepped down by using transformers.

Most of the electrical appliances work only with alternating current.

Generating direct current is more complicated than generating alternating current.

2.

Multiple Choice

45 sec

1 pt

The function of the transformer in the transmission of electricity is to

increase the resistance.

change the voltage.

reduce the time to transmit the electricity.

increase the power.

3.

Multiple Choice

30 sec

1 pt

Media Image

Electricity is generated at a .......

power station

petrol station

power source

source of energy

4.

Multiple Choice

30 sec

1 pt

Transformers .............. voltage for use in homes.

step down

step up

5.

Multiple Choice

30 sec

1 pt

Electricity is sent over ............... transmission lines.

low voltage

no voltage

high voltage

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