NEET2014Physics-Electromagnetism
NEET 2014 Physics Transformers MCQ Question
Type: MCQ-numerical-Medium-Class 12
A transformer having efficiency of 90% is working on 200 V and 3 kW power supply. If the current in the secondary coil is 6 Å, the voltage across the secondary coil and the current in the primary coil respectively are
A
300 V, 15 Å
B
450 V, 15 Å
C
450 V, 13.5 Å
D
600 V, 15 Å
Correct Answer
Option B
Detailed Explanation
The power output is 90% of 3000 W = 2700 W. With a secondary current of 6 Å, the secondary voltage is 450 V. The primary current is 15 Å.
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