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2 marksInduced e.m.f.

CSEC Physics · May/June 2005 · Paper 2 · Question 4(c)(i)

In Figure 1, the primary of a transformer is connected to a battery and a switch, while the secondary is connected to a centre-zero galvanometer.

Describe what would be observed on the galvanometer when the switch is closed.

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Other parts of this question

  1. 4(a)Explain what is meant by the term 'magnetic field'.[2 marks]
  2. 4(b)(i)Sketch the field pattern for the arrangement where the South pole of one magnet faces the North pole of another.[4 marks]
  3. 4(b)(ii)Sketch the field pattern for the arrangement where the South pole of one magnet faces the South pole of another.[4 marks]
  4. 4(c)(ii)Explain your answer.[3 marks]
  5. 4(c)(iii)Describe what would be observed on the galvanometer if the switch is subsequently opened.[2 marks]
  6. 4(c)(iv)Deduce what would be observed on the galvanometer if the battery were replaced by a low frequency a.c. supply.[1 mark]
  7. 4(c)(v)How would these observations be affected if the number of turns on the transformer secondary were significantly increased?[1 mark]

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