Computer Programming MCQs

5739 MCQs  (Page 489 of 574)

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The emf induced in a conductor of unit length moving with unit velocity at right angles to a magnetic field is equal to_____________?
A. Magnetic flux density
B. Torque
C. Mutual induction
D. Motional emf
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Which of the following uses electric energy and does not convert it into any other form ?
A. Transformer
B. Motor
C. D.c generator
D. A.c generator
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A.C and D.C have the same______________?
A. Effect in charging a capacitor
B. Effect in charging a battery
C. Effect while passing through an inductance
D. Heating effect through a resistance
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Power loss in actual transformer is due to_________________?
A. Small output
B. Eddy currents and magnetic hysterias
C. Soft iron core
D. Back emf
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If the coil is wound on an iron core the flux through it will_______________?
A. Decrease
B. Become zero
C. Remain the same
D. Increase
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Inductors acts as a short circuit for_______________?
A. Ac
B. Dc
C. Both a and b
D. None of these
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A.C cannot be used for________________?
A. Producing heat
B. Producing light
C. Magnetizing and electroplating
D. All the above
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Which of the following works on torque on the current carrying conductor placed in magnetic field ?
A. Galvanometer
B. Ammeter
C. Voltmeter
D. All of the above
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Which one of the following functions like a motor ?
A. Galvanometer
B. Ammeter
C. Voltmeter
D. All of above
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An alternating current or voltage________________?
A. Fluctuates off and on
B. Varies in magnitude alone
C. Changes its direction again and again
D. Changes its magnitude continuously and reverses its direction of flow after regularly recurring intervals.
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Word of the Day
17 Jul
Flagrant
(of an action considered wrong or immoral) conspicuously or obviously offensive.
انتہائی برا، قابل مذمت، فاش

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