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4.5.6a Construction and operation of a transformer

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Question 34

A step-up transformer is used to increase the voltage of electricity before it is transmitted along long-distance overhead power lines.

Which of the following best explains the primary reason for increasing the voltage for transmission?

A

Increasing the voltage decreases the current, which reduces the rate of thermal energy dissipation in the cables.

B

Increasing the voltage increases the current, which reduces the total resistance of the cables.

C

Increasing the voltage decreases the electrical resistance of the cables.

D

Increasing the voltage increases the speed of electrons, allowing electrical energy to travel faster across the network.

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4.5.6a Construction and operation of a transformer Questions

  1. IGCSE
  2. /Physics
  3. /4.5.6a Construction and operation of a transformer

136 exam-style questions on CIE IGCSE Physics 4.5.6a Construction and operation of a transformer. Each one has a worked solution and a mark scheme showing where the marks go.

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