A circular ring is carrying uniformly distributed charge q and a point charge – Q on the axis of the ring. The magnitude of dipole moment of the charge system is (Assume distance between centre of ring and point charge is d and radius of ring R)

Electromagnetic Field Theory
A circular ring is carrying uniformly distributed charge q and a point charge – Q on the axis of the ring. The magnitude of dipole moment of the charge system is (Assume distance between centre of ring and point charge is d and radius of ring R)

Q√(R2 + d2).

QD.

QR2/d.

QR.

Q√(R2 + d2).

QD.

QR2/d.

QR.

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Electromagnetic Field Theory
The transmitting antennas for lower frequencies (below 500 kHz) are generally

Horizontal suspended wire type

Parabolic reflector type

Any of the above

Vertical grounded wire type

Horizontal suspended wire type

Parabolic reflector type

Any of the above

Vertical grounded wire type

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Electromagnetic Field Theory
Two coils are coupled in such a way that the mutual inductance between them is 20 mH. If the inductances of the coils are 40 mH and 50 mH respectively, the coefficient of coupling is

0.477.

0.01.

0.447.

0.577.

0.477.

0.01.

0.447.

0.577.

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Electromagnetic Field Theory
According to Coulomb’s law, the force of attraction or repulsion, between to electrical charges is

inversely proportional to the distance between them.

inversely proportional to the square of the distance between them.

directly proportional to the square of the distance between them.

directly proportional to the distance between them.

inversely proportional to the distance between them.

inversely proportional to the square of the distance between them.

directly proportional to the square of the distance between them.

directly proportional to the distance between them.

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Electromagnetic Field Theory
A coil of 300 turns is wound on a non magnetic core having a mean circumference of 300 mm and a cross sectional area of 300 mm2. The inductance of the coil corresponding to a magnetizing current of 6 A will be

37.68 μH.

1.1304 μH.

3.768 μH.

113.04 μH.

37.68 μH.

1.1304 μH.

3.768 μH.

113.04 μH.

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Electromagnetic Field Theory
The power gain of a half-wave dipole with respect to an isotropic radiator is

6 db

2.15 db

3 db

4.15 db

6 db

2.15 db

3 db

4.15 db

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Electromagnetic Field Theory

Electromagnetic Field Theory A circular ring is carrying uniformly distributed charge q and a point charge – Q on the axis of the ring. The magnitude of dipole moment of the charge system is (Assume distance between centre of ring and point charge is d and radius of ring R)

Electromagnetic Field Theory The transmitting antennas for lower frequencies (below 500 kHz) are generally

Electromagnetic Field Theory Two coils are coupled in such a way that the mutual inductance between them is 20 mH. If the inductances of the coils are 40 mH and 50 mH respectively, the coefficient of coupling is

Electromagnetic Field Theory According to Coulomb’s law, the force of attraction or repulsion, between to electrical charges is

Electromagnetic Field Theory A coil of 300 turns is wound on a non magnetic core having a mean circumference of 300 mm and a cross sectional area of 300 mm2. The inductance of the coil corresponding to a magnetizing current of 6 A will be

Electromagnetic Field Theory The power gain of a half-wave dipole with respect to an isotropic radiator is

Electromagnetic Field Theory
A circular ring is carrying uniformly distributed charge q and a point charge – Q on the axis of the ring. The magnitude of dipole moment of the charge system is (Assume distance between centre of ring and point charge is d and radius of ring R)

Electromagnetic Field Theory
The transmitting antennas for lower frequencies (below 500 kHz) are generally

Electromagnetic Field Theory
Two coils are coupled in such a way that the mutual inductance between them is 20 mH. If the inductances of the coils are 40 mH and 50 mH respectively, the coefficient of coupling is

Electromagnetic Field Theory
According to Coulomb’s law, the force of attraction or repulsion, between to electrical charges is

Electromagnetic Field Theory
A coil of 300 turns is wound on a non magnetic core having a mean circumference of 300 mm and a cross sectional area of 300 mm2. The inductance of the coil corresponding to a magnetizing current of 6 A will be

Electromagnetic Field Theory
The power gain of a half-wave dipole with respect to an isotropic radiator is