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4.5.6a Construction and operation of a transformer

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Question 33

Before electricity is transmitted over long-distance overhead power lines, a step-up transformer is used at the power station.

Which statement correctly explains the effects of this step-up transformer on voltage and current, and its main benefit?

A

It decreases the voltage and increases the current, preventing the cables from melting.

B

It increases the voltage and decreases the current, reducing the thermal energy lost in the cables.

C

It increases the voltage and increases the current, increasing the total power delivered.

D

It decreases the voltage and decreases the current, making long-distance transmission safer.

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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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