⚡Electrical Engineering MCQs
Electrical Engineering MCQs
499 MCQs451
A 25eV electron has a speed of______________?
A2 x 106m/sec
B3 x 106m/sec
C5 x 106m/sec
D4 x 106m/sec
452
Equipotential planes are_______________?
Aparallel to one another
Bnon parallel to one another
Cintersecting
Dcircular
453
A metal rod of 25 cm length is moving at a speed of 0.5/sec in direction perpendicular to 0.25T magnetic field. Emf produced in the rod is_____________?
A0 volt
B3.125 volt
C31.25 volt
D0.03125 volt
454
The self-inductance of a solenoid is increased when a soft iron core is inserted into it. This is because the soft iron core_______________?
ADecreases the resistance of the solenoid
BReduces the effect of eddy current
CImproves the flux linkage between the turns of the coil
DIncreases the mutual inductance between the solenoid and the core
455
An aeroplane of wingspan 10m flies from the equator towards the North Pole. The wings are perpendicular to the vertical component of the earths magnetic field (B = 4×10-5T). At maximum speed an emf of 96mV is induced across the wing tips. The maximum speed of the aeroplane is____________?
A150msec-1
B384msec-1
C38.4msec-1
D200msec-1
456
Value of εr for various dielectrics is always________________?
ALess than unity
BEqual to the unit
CLarger than unit
DNo hard and fast rule
457
Which one of the following can be taken as the measure of electric intensity ?
AF/A
BV/A
CVF/A
Dq/VA
458
Electric flux due to a point charge +q is______________?
A1/4IIɛ q/r
Bq/ɛ0
C1/4IIɛ0. q/r2
D4IIɛ0
459
N/C =_____________?
AV/A
BJ/V
CV/m
DA/m
460
Photocopier and inject printer are dealt in________________?
AElectrostatics
BCharges in motion
CCapacitors
DElectric fields