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Electromagnetic Field Theory

Electromagnetic Field Theory
A fan blade of length 2R rotates in a time period T in a magnetic field B. The induced voltage in the blade is proportional to

 R2B / T.
 2RBT.
 R2BT.
 RBT.

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Electromagnetic Field Theory
An infinite sheet has a charge density of 150 μ C/m. The flux density in μ C/m 2 is

 50.
 1/75.
 75.
 100.

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Electromagnetic Field Theory
Radiation intensity in a given direction is the

Energy radiated per square metre
Power radiated per square metre
None of these
Power radiated per unit solid angle in that direction

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Electromagnetic Field Theory
inductance (L2) in parallel without mutual coupling will be

 5 mH.
 20 mH.
 10 mH.
 15 mH.

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

6 db
3 db
4.15 db
2.15 db

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Electromagnetic Field Theory
Cork Screw rule is used to find

 direction of magnetic field.
 direction of current.
 direction of emf.
 direction of electric field.

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