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Electromagnetic Field Theory
The Biot-savarts law is a general modification of
Amperes law.
Lenzs law.
Faradays law.
Kirchhoffs law.
Amperes law.
Lenzs law.
Faradays law.
Kirchhoffs law.
Answer
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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
1144 μN.
1440 μN.
244 μN.
144 μN.
1144 μN.
1440 μN.
244 μN.
144 μN.
Answer
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Electromagnetic Field Theory
The developed electromagnetic force and or torque in electromechanical energy conversion system act in a direction that tends
to decrease the stored energy at constant mmf.
to decrease the co-energy at constant mmf.
to decrease the stored energy at constant flux.
to increase the stored energy at constant flux.
to decrease the stored energy at constant mmf.
to decrease the co-energy at constant mmf.
to decrease the stored energy at constant flux.
to increase the stored energy at constant 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
25 W.
50 W.
20 W.
15 W.
25 W.
50 W.
20 W.
15 W.
Answer
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Electromagnetic Field Theory
In an impedance smith chart, a clockwise movement along a constant resistance circle gives rise to
Decrease in the value of reactance
No change in the reactance value
No change in the impedance value
An increase in the value of reactance
Decrease in the value of reactance
No change in the reactance value
No change in the impedance value
An increase in the value of reactance
Answer
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Electromagnetic Field Theory
Magnetic current is composed of which of the following?
Both conduction and displacement current.
None of these
Only displacement current.
Only conduction current.
Both conduction and displacement current.
None of these
Only displacement current.
Only conduction current.
Answer
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