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Question 11 - CDCS-001 discussion

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AC is more easily distributed than DC. This is because:

A.

AC can be transmitted using lighter wires.

Answers
A.

AC can be transmitted using lighter wires.

B.

DC needs wires to be totally insulated, while AC wires can be bare, hung from insulator on pylons.

Answers
B.

DC needs wires to be totally insulated, while AC wires can be bare, hung from insulator on pylons.

C.

AC can be transformed from a low voltage to a high voltage and back again with a transformer. DC cannot.

Answers
C.

AC can be transformed from a low voltage to a high voltage and back again with a transformer. DC cannot.

D.

Wires have less resistance if they are carrying AC

Answers
D.

Wires have less resistance if they are carrying AC

Suggested answer: C

Explanation:

AC can be transformed from a low voltage to a high voltage and back again with a transformer, while DC cannot. This makes it easier to distribute AC electricity over long distances and is why it is used more widely than DC electricity. A and B are also true, as wires carrying AC can be bare and don't need to be totally insulated. Wires have less resistance when carrying AC electricity, which is why it is more efficient than DC.

asked 18/11/2024
henk Bouman
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