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A step down transformer is used on a 1000 V line to deliver 20 A at 120 V at the secondary coil. If the efficiency of the transformer is 80%, the current drawn from the line is
Options
(a) 3A
(b) 30 A
(c) 0.3 A
(d) 2.4 A
Correct Answer:
3A
Explanation:
No explanation available. Be the first to write the explanation for this question by commenting below.
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Topics: Alternating Current
(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The angle between the two vectors A = 3i+4j+5k and B = 3i+4j-5k will be
- When two identical capacitors are in series, they have 3 μF capacitance
- Small drops of the same size are charges to V volt each. If n such drops coalesce
- The net electric force on a charge of +3μC at the mid-point on the line joining two
- If r be the distance of a point on the axis of a magnetic dipole from its centre
Topics: Alternating Current (96)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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