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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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Subject: Physics
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- What is the Q-value of the reaction? ¹H+⁷Li→⁴He+⁴He
- An a.c. supply gives 30 volt r.m.s which passes through a 10Ω resistance.
- The work of 146 kJ is performed in order to compress one kilo mole fo gas adiabatically
- The ionisation energy of hydrogen is 13.6 eV. The energy of the photon released
- The escape velocity of a body on an imaginary planet which is thrice the radius
Topics: Alternating Current (96)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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