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A transformer rated at 10 KW is used to ...

A transformer rated at 10 KW is used to connect a 5KV transmission line to a 250 V circuit. What is the ratio of the turns in the primary and secondary windings of the transformer?

A

A. 10

B

B. 15

C

C. 20

D

D. 25

Text Solution

Verified by Experts

The correct Answer is:
C
the transmission line of 5 KV or 5000 V is to be connected to a 250 V circuit by using the transformer. Thus it is a step down transformer.
`:. (V_p)/(V_s) = (n_p)/(n_s) :. (n_p)/(n_s) = 5000/250 = 20`.
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MARVEL PUBLICATION-ELECTROMAGNETIC INDUCTION AND ALTERNATING CURRENTS -TEST YOUR GRASP - 16
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