The voltage and current in the primary of a transformer are 200V and 2A respectively. lf the transformer is used to light ten 12 V, 30 W bulbs, calculate its efficiency.

by | Aug 27 | Physics WAEC | 0 comments

A. 100%
B. 90%
C. 75%
D. 50%

Correct Answer:

Option C – 75%

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