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A step-down transfomer reduces the volta...

A step-down transfomer reduces the voltage of a transmission line from 2200 V to 220 V. the power delivered by it is 880 W and its efficiency is 88%. The input current is

A

4.65 mA

B

0.465 A

C

0.4545 A

D

4.65 A

Text Solution

Verified by Experts

The correct Answer is:
C
`eta=P_(S)/P_(P)=(880)/(2200xxi_(p))rArri_(p)=880/(2200xx0.88)=0.454A`.
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