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Electromagnetic Field Theory
Which of the following is zero in relation to electromagnetic fields?
Div grad V.
Grad div A.
Div curl A.
Curl curl A.
Div grad V.
Grad div A.
Div curl A.
Curl curl A.
Answer
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Related Question
Electromagnetic Field Theory
Two coils have inductances L1 = 1200 mH and L2 = 800 mH. They are connected in such a way that flux in the two coils aid each other and inductance is measured to be 2500 mH, then Mutual inductance between the coils is ___________ mH.
250.
150.
225.
145.
250.
150.
225.
145.
Answer
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Electromagnetic Field Theory
Which of following is true for a purely inductive circuit ?
Apparent power of the circuit is zero.
Reactive power of the circuit is zero.
Any capacitance even if present in the circuit will not be charged.
Actual power of the circuit is zero.
Apparent power of the circuit is zero.
Reactive power of the circuit is zero.
Any capacitance even if present in the circuit will not be charged.
Actual power of the circuit is zero.
Answer
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Electromagnetic Field Theory
If the static magnetic flux density is B, then
Divergence of B = J.
Curl of B = 0.
Divergence of B = 0.
Curl of B = J.
Divergence of B = J.
Curl of B = 0.
Divergence of B = 0.
Curl of B = J.
Answer
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Electromagnetic Field Theory
In above problem, if the inductance L1 and L2 in series aiding with 30 mH mutual inductance, then total inductance will be
200 mH.
150 mH.
100 mH.
50 mH.
200 mH.
150 mH.
100 mH.
50 mH.
Answer
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Electromagnetic Field Theory
The tubes of force within the magnetic material are known as
tubes of indication.
none of them.
magnetic flux.
lines of force.
tubes of indication.
none of them.
magnetic flux.
lines of force.
Answer
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