a. The transformer in the diagram below is used to convert 240 V a.c. to 6 V a.c.

i. Using the information above, calculate the number of turns on the secondary coil.

ii. Describe how the transformer works.

iii. State one way in which energy is lost from the transformer, and from which part it is lost.

b. The diagram below shows a device labelled 'IGCSE Transformer'.

Study the label on the case of the IGCSE Transformer.

i. What is the output of the device?

ii. From the information on the case, deduce what other electrical component must be included within the case of the IGCSE Transformer, apart from a transformer.

c. A transformer supplying electrical energy to a factory changes the 11 000 V a.c. supply to 440 V a.c. for use in the factory. The current in the secondary coil is 200 A. Calculate the current in the primary coil, assuming no losses from the transformer.

Transcribed Image Text:

ion core Oc AO OD BO secondary coil primary, cl (480 turns)