a) Describe with the help of a labelled diagram the working of a step up transformer.

b) Write any 2 sources of energy loss in a transformer.

c) A step up transformer converts a low voltage into high voltage. Does it not violate the principle of conservation of energy? Explain

The working of step - up transformer along with diagram and its losses are well explained in your study material. Please go through it. In case of any doubts, do get back to us.
Follow the link given below for part (a) and part (b) :-
https://www.meritnation.com/cbse/class12-science/studymaterial/physics/physics-part-i/alternating-current/16_251_8763#slide6_transformers
Follow the link given below to get the answer for part (c) :-
https://www.meritnation.com/ask-answer/question/a-step-up-transformer-converts-a-low-input-voltage-into/physics/6828360

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