Why transformer cannot be used the step up D.C. voltage?

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

Why a transistor cannot be used as a rectifier ?

Explain the principle, construction and working of a step down transformer. Can it be used with a d.c. circuit?

The question given below consist of an assertion (A) and a reason ( R). Use the following key to choose the appropriate answer to these questions from the codes (a), (b), ( c) and (d) given below: (a) Both A and R are true and R is the correct explanation of A. (b) Both A and R are true but R is NOT the correct explanation of A. (c) A is true but R is false. (d) A is false and R is also false. Assertion:A step up transformer can also be used as a step down transformer. Reason:Because (E_s)/(E_p)=(N_s)/(N_p) .

Why choke coil cannot be used in d.c.?

A transformer steps up or steps down

The primary coil of an ideal stepup transformer has 100 turns and the transformer ratio is also 100. The input voltage and power are 220 V and 1100 W. Calculate voltage across the secondary