Computer Programming MCQs

5739 MCQs  (Page 174 of 574)

Attempt Computer Programming MCQs Quiz
The initial rate of rise of current through a coil of inductance 10 H when suddenly connected to a D.C. supply of 200 V is__________Vs
A. 50
B. 20
C. 0.05
D. 500
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If the area of hysteresis loop of a material is large, the hysteresis loss in this material will be____________?
A. Zero
B. Small
C. Large
D. None of the above
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A material for good magnetic memory should have____________?
A. Low hysteresis loss
B. High permeability
C. Low retentivity
D. High retentivity
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Those magnetic materials are best suited for making armature and transformer cores which have ________ permeability and ________ hystersis loss
A. High, high
B. Low, high
C. High, low
D. Low, low
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Which of the following circuit element stores energy in the electromagnetic field ?
A. Inductance
B. Condenser
C. Variable resistor
D. Resistance
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Higher the self-inductance of a coil_____________?
A. Lesser its weber-turns
B. Lower the e.m.f. induced
C. Greater the flux produced by it
D. Longer the delay in establishing steady current through it
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Both the number of turns and the core length of an inductive coil are doubled. Its self-inductance will be_____________?
A. Unaffected
B. Doubled
C. Halved
D. Quadrupled
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In an iron cored coil the iron core is removed so that the coil becomes an air cored coil. The inductance of the coil will_____________?
A. Increase
B. Decrease
C. Remain the same
D. Initially increase and then decrease
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As per Faraday’s laws of electromagnetic induction, an e.m.f. is induced in a conductor whenever it_______________?
A. Lies perpendicular to the magnetic flux
B. Lies in a magnetic field
C. Cuts magnetic flux
D. Moves parallel to the direction of the magnetic field
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The inductance of a coil will increase under all the following conditions except______________?
A. When more length for the same number of turns is provided
B. When the number of turns of the coil increase
C. When more area for each turn is provided
D. When permeability of the core increases
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Word of the Day
21 Jul
Refrain
stop oneself from doing something.
روکنا، پرہیز کرنا

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