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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
- A bucket full of water is revolved in a vertical circle of 2m
- Two metallic spheres of radii 1 cm and 3 cm are given charges of -1 x 10⁻² C
- An object placed at 20 cm in front of a concave mirror produces three times
- The magnetic field at the centre of a circular coil carrying current I ampere is B.
- When ₉₀Th²²⁸ transforms to ₈₃Bi²¹², the number of emitted α and β particles
Topics: Alternating Current (96)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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