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4.5.6a Construction and operation of a transformer

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Question 31

Which of the following pairs correctly identifies the best material for each component of an efficient electrical transformer and the primary reason for its choice?

A

Core: Soft iron to minimize hysteresis loss; Windings: Copper to minimize Joule heating (I2RI^2RI2R loss).

B

Core: Steel to maintain a permanent magnetic field; Windings: Copper to maximize magnetic flux leakage.

C

Core: Copper to ensure high electrical conductivity through the center; Windings: Soft iron to restrict current flow.

D

Core: Soft iron to act as an electrical insulator; Windings: Steel to increase the mechanical strength of the coils.

Markscheme

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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