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Electromagnetic Field Theory

Electromagnetic Field Theory
The frequency range for satellite communication is

3 to 30 kHz
3000 to 30000 MHz
300 to 3000 kHz
30000 to 300000 MHz

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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

 RBT.
 R2B / T.
 R2BT.
 2RBT.

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Electromagnetic Field Theory
The magnetic intensity in A/m at the centre of circular coil of diameter 1m and carrying a current of 2A is

 3.
 8.
 2.
 4.

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Electromagnetic Field Theory
Parabolic and lens antenna used at

High frequency
Low frequency
Medium frequency
Microwave frequency

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Electromagnetic Field Theory
The force experienced by a current carrying conductor lying parallel to a magnetic field is

 Bil sinθ.
 Bil cosθ.
 zero.
 BIL.

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Electromagnetic Field Theory
Magnetic circuit with cross sectional area of 20 cm2 is to be operated at 50 Hz from 120 Vrms supply. The number of turns required to active a peak magnetic flux density of 1.8 T in the core flux is

 300.
 600.
 150.
 450.

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MORE MCQ ON Electromagnetic Field Theory

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