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4 marksTransformers

CSEC Physics · May/June 2011 · Paper 2 · Question 5(a)(ii)

Many modern electrical appliances have been designed to operate with a.c. power rather than d.c. power because electrical power is transmitted as a.c. rather than d.c.

Draw a diagram of a simple transformer indicating the features which enhance efficiency.

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Other parts of this question

  1. 5(a)(i)State TWO advantages of using a.c. to transmit electrical power.[2 marks]
  2. 5(b)(i)If the number of turns in the secondary coil is 900, calculate the number of turns in the primary coil for an ideal transformer.[3 marks]
  3. 5(b)(ii)Calculate the transmission current for the ideal transformer referred to at (b) (i).[3 marks]
  4. 5(b)(iii)Calculate the transmission power if the transformer is 70% efficient.[3 marks]

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