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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
- If the radius of star is R and it acts as a black body, what would be the temperature
- During production of cathode ray
- The resistance of an ammeter is 13Ω and its scale is graduated for a current
- An electric kettle has two heating elements. One brings it to boil in ten minutes
- A parallel plate capacitor with air between the plates has a capacitance of 9 pF.
Topics: Alternating Current (96)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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