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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
- A particle moving along X-axis has acceleration f,at time t given by f=fₒ(1- t/T)
- A piece of iron is heated in a flame. It first comes dull red then becomes reddish
- An avarage induced e.m.f. of 1 V appears in a coil when the current in it is changed
- A Carnot engine, having an efficiency of η=1/10 as heat engine, is used
- A wire of one metre length carries a constant current. The wire is bent to form
Topics: Alternating Current (96)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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