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An electric motor runs on DC source of emf 200 V and draws a current of 10 A. If the efficiency be 40%, then the resistance of armature is
Options
(a) 2Ω
(b) 8Ω
(c) 12Ω
(d) 16Ω
Correct Answer:
12Ω
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 material suitable for making electromagnets should have
- A ball is dropped from a height of 20 cm. Ball rebounds to a height of 10cm
- The angle of incidence at which reflected light is totally polarised for refraction
- A satellite A of mass m is at a distance r from the centre of earth. Another satellite
- A step down transformer is used on a 1000 V line to deliver 20 A at 120 V
Topics: Alternating Current (96)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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