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2 marksTransformers

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

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.

State TWO advantages of using a.c. to transmit electrical power.

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Other parts of this question

  1. 5(a)(ii)Draw a diagram of a simple transformer indicating the features which enhance efficiency.[4 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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