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Electromagnetic Field Theory
The principle of dynamically induced emf is utilized in a
thermocouple.
transformer.
generator.
choke.
thermocouple.
transformer.
generator.
choke.
Answer
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Related Question
Electromagnetic Field Theory
A negative point charge q = - 40 nC is moving with velocity of 6 × 106 m/s in a direction specited by unit vector uy + 0.6 uz. Find the magnitude of force vector on the moving particle by the field B = 2 ux + 3 uy + 5 uz mT and E = 2 ux - 3 uy + 5 uz KV/m
1440 μN.
1144 μN.
244 μN.
144 μN.
1440 μN.
1144 μN.
244 μN.
144 μN.
Answer
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Electromagnetic Field Theory
________ at a point is defined as the force experienced per unit positive charge at a point placed in the electric field.
Electric intensity.
None of these
Magnetic flux density.
Electric flux.
Electric intensity.
None of these
Magnetic flux density.
Electric flux.
Answer
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Electromagnetic Field Theory
The hysteresis loop of a magnetic material has an area of 5 cm2 with the scale given as 1 cm = 2 AT and 1 cm = 50 mwb At 50 Hz; the total hysteresis loss is
15 W.
50 W.
20 W.
25 W.
15 W.
50 W.
20 W.
25 W.
Answer
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Electromagnetic Field Theory
Two straight parallel conductors carry equal currents in opposite direction. The force between them is
zero.
none of above.
attractive.
repulsive.
zero.
none of above.
attractive.
repulsive.
Answer
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Electromagnetic Field Theory
If n is the polarization vector and k is the direction of propagation plane electromagnetic wave, then
n. k = 0.
n = - k.
n = K.
n × k = 0.
n. k = 0.
n = - k.
n = K.
n × k = 0.
Answer
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