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Electromagnetic Field Theory

Electromagnetic Field Theory
The Biot-savarts law is a general modification of

 Kirchhoffs law.
 Amperes law.
 Lenzs law.
 Faradays law.

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Electromagnetic Field Theory
A vector field A = p In is given in Cartesian coordinates. In cylindrical coordinates it will be represented as

 A = cosφ Ir - sinφ Ir.
 A = cosφ Ir + sinφ Iφ.
 A = cosφ Ir.
 A = sinφ Ir.

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Electromagnetic Field Theory
The core of coil length is 200 mm. The inductance of coil is 6 mH. If the core length is doubled, all other quantities, remaining the same, the inductance will be

 48 mH.
 12 mH.
 3 mH.
 24 mH.

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Electromagnetic Field Theory
Poyniting vector has the dimensions

 Watts/metre2.
 Watt × metre2.
 Watt/metre.
 Watt × metre.

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Electromagnetic Field Theory
A charge which when placed in vacuum from an equal and similar charge repels with a force of 9 × 103 N, is known as

 micro - coulomb.
 pico - coulomb.
 milli - coulomb.
 coulomb.

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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

 second law
 fourth law
 first law
 third law

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