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Electromagnetic Field Theory
A metal sphere with 1 m radius and a surface charge density of 10 coulombs/m2 is enclosed in a cube of 10 m side. The total outward electric displacement normal to the surface of the cube is
10 C.
40π C.
None of above.
5 C.
10 C.
40π C.
None of above.
5 C.
Answer
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Related Question
Electromagnetic Field Theory
Gradient of scalar field is expressed as
Gradient of divergence of a vector field minus the curl of the vector field.
Circulation of a vector field per unit area as the area tends to zero.
Maximum rate of increase of scalar function at a point.
Outward flux of a vector field per unit volume as the volume about the point tends to zero.
Gradient of divergence of a vector field minus the curl of the vector field.
Circulation of a vector field per unit area as the area tends to zero.
Maximum rate of increase of scalar function at a point.
Outward flux of a vector field per unit volume as the volume about the point tends to zero.
Answer
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Electromagnetic Field Theory
A pure inductor is connected across a voltage source. Find the active power drawn by the inductor?
0
None of these
either 1 or 2
maximum
0
None of these
either 1 or 2
maximum
Answer
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Electromagnetic Field Theory
1 Maxwell is the same as
104 weber.
10-4 weber.
10-8 weber.
10-8 weber.
104 weber.
10-4 weber.
10-8 weber.
10-8 weber.
Answer
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Electromagnetic Field Theory
MUF is highest in periods of greatest sunspot activity.
False
True
False
True
Answer
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Electromagnetic Field Theory
For an inductor, current is proportional to
none of them.
voltage across the inductor.
both (A) and (B).
magnetic field.
none of them.
voltage across the inductor.
both (A) and (B).
magnetic field.
Answer
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