An inductor designed with 400 turns coil wound on an iron core of 16 cm2 cross sectional area and with a cut of air gap length of 1 mm. The coil is connected to a 230 V, 50 Hz supply. Neglected coil resistance, core loss, iron reluctance and leakage inductance. Find the current in the inductor.

Electromagnetic Field Theory
An inductor designed with 400 turns coil wound on an iron core of 16 cm2 cross sectional area and with a cut of air gap length of 1 mm. The coil is connected to a 230 V, 50 Hz supply. Neglected coil resistance, core loss, iron reluctance and leakage inductance. Find the current in the inductor.

4.56 A.

18.08 A.

9.04 A.

2.28 A.

4.56 A.

18.08 A.

9.04 A.

2.28 A.

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Electromagnetic Field Theory
Two straight parallel conductors carry equal currents in opposite direction. The force between them is

repulsive.

attractive.

zero.

none of above.

repulsive.

attractive.

zero.

none of above.

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Electromagnetic Field Theory
Whenever the magnetic flux changes with respect to an electric conductor or a coil, an EMF is induced in the conductor is Faraday’s

fourth law

second law

third law

first law

fourth law

second law

third law

first law

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Electromagnetic Field Theory
Radiation intensity in a given direction is the

Power radiated per unit solid angle in that direction

Power radiated per square metre

None of these

Energy radiated per square metre

Power radiated per unit solid angle in that direction

Power radiated per square metre

None of these

Energy radiated per square metre

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Electromagnetic Field Theory
A magnetic field B = 5 × 10-2 uz T exerts a force on 0.02 m conductor along the x-axis. The conductor carried a current of 5 mA in the – ux direction. What force must be applied to the conductor to hold it in position

5 × 10-5 uz N.

5 × 10-5 uy N.

- 5 × 10-5 uy N.

5 × 10-5 ux N.

5 × 10-5 uz N.

5 × 10-5 uy N.

- 5 × 10-5 uy N.

5 × 10-5 ux N.

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Electromagnetic Field Theory
Gradient of scalar field is expressed as

Gradient of divergence of a vector field minus the curl of the vector field.

Outward flux of a vector field per unit volume as the volume about the point tends to zero.

Maximum rate of increase of scalar function at a point.

Circulation of a vector field per unit area as the area tends to zero.

Gradient of divergence of a vector field minus the curl of the vector field.

Outward flux of a vector field per unit volume as the volume about the point tends to zero.

Maximum rate of increase of scalar function at a point.

Circulation of a vector field per unit area as the area tends to zero.

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Electromagnetic Field Theory

Electromagnetic Field Theory Two straight parallel conductors carry equal currents in opposite direction. The force between them is

Electromagnetic Field Theory Whenever the magnetic flux changes with respect to an electric conductor or a coil, an EMF is induced in the conductor is Faraday’s

Electromagnetic Field Theory Radiation intensity in a given direction is the

Electromagnetic Field Theory A magnetic field B = 5 × 10-2 uz T exerts a force on 0.02 m conductor along the x-axis. The conductor carried a current of 5 mA in the – ux direction. What force must be applied to the conductor to hold it in position

Electromagnetic Field Theory Gradient of scalar field is expressed as

Electromagnetic Field Theory
Two straight parallel conductors carry equal currents in opposite direction. The force between them is

Electromagnetic Field Theory
Whenever the magnetic flux changes with respect to an electric conductor or a coil, an EMF is induced in the conductor is Faraday’s

Electromagnetic Field Theory
Radiation intensity in a given direction is the

Electromagnetic Field Theory
A magnetic field B = 5 × 10-2 uz T exerts a force on 0.02 m conductor along the x-axis. The conductor carried a current of 5 mA in the – ux direction. What force must be applied to the conductor to hold it in position

Electromagnetic Field Theory
Gradient of scalar field is expressed as