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ELECTROMAGNETIC FIELD THEORY

Electromagnetic Field Theory
The magnetic vector potential due to a single conductor carrying current is

 zero.
 none of tha above.
 finite.
 infinite.

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

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

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Electromagnetic Field Theory
A conductor of length 1 metre moves at right angles to magnetic field of flux density 1 Wb/m2 with a velocity of 25 m/s. The induced emf in the conductor will be

 50 V.
 100 V.
 75 V.
 25 V.

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Electromagnetic Field Theory
A magnetic material has a total flux B of 80 micro Wb with an mmf of 160 AT. The reluctance in ampere turn per weber is

 2 × 10-6.
 2 × 10-8.
 2 × 106.
 2 × 108.

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Electromagnetic Field Theory
The force required to seperate two surfaces with a contact area measuring 5 cm by 6 cm, when flux density normal to the surface is 0.8 tesla, will be

 764 N.
 76400 N.
 7640 N.
 76.4 N.

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