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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
- Three capacitors of capacitances 3 μF, 10 μF and 15 μF are connected in series
- Three particles A,B and C are thrown from the top of a tower with the same speed.
- In Young’s double slit experiment, the slit seperation is 1 mm and the screen
- A solid body rotates about a stationary axis, so that its angular velocity
- A focal length of a lens is 10 cm. What is power of a lens in dioptre?
Topics: Alternating Current (96)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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