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4.5.6a Construction and operation of a transformer

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Question 39

A 100% efficient transformer converts a 120 V input voltage to a 6.0 V output voltage. The output power of the transformer can be a maximum of 30 W.

The output is connected to three 0.40 A bulbs in parallel. One of the bulbs fails.

How does the current in the primary coil change?

A

It decreases by 0.40 A0.40\text{ A}0.40 A.

B

It decreases by 0.020 A0.020\text{ A}0.020 A.

C

It increases by 0.020 A0.020\text{ A}0.020 A.

D

It remains unchanged.

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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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