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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 magnetic field at the centre of a circular coil carrying current I ampere is B.
- In a water fall, the water falls from a height of 100 m. If the entire kinetic energy
- An electric dipole of dipole moment p is aligned parallel to a uniform electric field E
- A 1m long wire of diameter 0.31 mm has a resistance of 4.2Ω. If it is replaced by
- A motorcycle moving with a velocity 72 kmh⁻¹ on a flat road takes a turn
Topics: Alternating Current (96)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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