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A step down transformer converts transmi...

A step down transformer converts transmission line voltage from 2200 V to 220 V. Primary coil is having 5000 turns. Efficiency of transformer is 90% and output power is 8 kW. Evaluate number of turns in secondary coil and input power.

A

8.89 kW

B

88.9 kW

C

889 kW

D

989 kW

Text Solution

Verified by Experts

The correct Answer is:
A
`eta = (P_("output"))/(P_("input"))`
`:. 9/10 = (P_o)/(P_i) :. 9/10 = 8/(P_(i))`
`:. P_(i) = 80/9 = 8.89 kW`.
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MARVEL PUBLICATION-ELECTROMAGNETIC INDUCTION AND ALTERNATING CURRENTS -TEST YOUR GRASP - 16
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