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A transformer steps up or steps down...

A transformer steps up or steps down

A

a.c. only

B

d.c. only

C

either a.c. or d.c.

D

a.c. mixed with d.c.

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A transformer is used to step down a.c. voltage. What appliance will you used to step down a d.c.voltage?

Direction. In the following questions, a statement of assertion is followed by a statement of reason. While answering a question, you are required to choose the correct are out of the given four responses and mark it as (A). If both assertion and reason are true and reason is the correct explanation of the assertion, (B) if both assertion and reason are true but reason is not correct explanation of the assertion. (C) if assertion is true, but reason if false, (D) if both assertion and reason are false Assertion : A transformers are used only with an a.c. source and not with the d.c. source. Reason : Only a.c. can be stepped up or stepped down by means of transformers.

Describe briefly, with the help of a lablled diagram, working of a step-up transformer. A step up transformer converts a low voltage in to high voltage. Does it not violate the principle of conservation of energy?

How much current is drawn by the primary coil of a transformer, which steps down 220V to 22 V to operate a device with an impedance of 220 ohm?

MODERN PUBLICATION-TEXTUAL QUESTIONS-EXERCISE
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