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Electromagnetic Field Theory
An electric dipole of moment P is placed in front of a ground sphere. The change induced on the surface of the sphere is (Assume radius of sphere = R and distance from dipole to centre of sphere = d)
PR/d2.
PR/d.
Zero.
PR 2/d3.
PR/d2.
PR/d.
Zero.
PR 2/d3.
Answer
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Related Question
Electromagnetic Field Theory
MUF is highest in periods of greatest sunspot activity.
False
True
False
True
Answer
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Electromagnetic Field Theory
A plane wave in a homogeneous medium has E = 50 sin(108t + 2z) uy V/m. What is the direction of wave propagation
y direction.
– y direction.
z direction.
– z direction.
y direction.
– y direction.
z direction.
– z direction.
Answer
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Electromagnetic Field Theory
In an iron core coil the iron core is removed so that the coil becomes an air core coil. The inductance of the coil will
increase.
remain the same.
initially increase and then decrease.
decrease.
increase.
remain the same.
initially increase and then decrease.
decrease.
Answer
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Electromagnetic Field Theory
Two identical circular coils, one closed and another is little split (not enclosed) are placed in an uniform magnetic field which decrease at a constant rate. If the plane to the coils are perpendicular to the field which of the following statements is true?
Joule heating does not occur in each of the coils.
An emf is induced in both coils.
Equal joule heating occurs in both coils.
An emf is induced in split coil.
Joule heating does not occur in each of the coils.
An emf is induced in both coils.
Equal joule heating occurs in both coils.
An emf is induced in split coil.
Answer
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Electromagnetic Field Theory
A conductor of length 100 cm moves at right angles to a magnetic field of flux density 1.5 Wb/m2 with a velocity of 50 m/s. The induced emf in the conductor will be
150 V.
50 V.
75 V.
37.5 V.
150 V.
50 V.
75 V.
37.5 V.
Answer
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