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Electromagnetic Field Theory

Electromagnetic Field Theory
An electric field of 1.92 × 103 N/C is maintained across two plates separated by 0.015 m. Potential difference across plates will be

 1.4 V.
 28.8 V.
 2.88 V.
 14.40 V.

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Electromagnetic Field Theory
In free space E (z, t) = 103 sin(ωt - βz) uy v/m. What is the value of H (z, t)

 None of above.
 (103/377) sin(ωt - β z)(ux) A/m.
 (103/377) sin(ωt - β z)(-ux) A/m.
 (103/377) cos(ωt - β z)(-ux) A/m.

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Electromagnetic Field Theory
In above question no. 9, the average force on the core to reduce the air gap will be

 6664.8 N.
 1666.22 N.
 832.29 N.
 3332.47 N.

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Electromagnetic Field Theory
The energy stored in the magnetic field in a solenoid 30 cm long and 3 cm diameter wound with 1000 turns of wire carrying a current at 10 amp, is

 0.015 joule.
 0.015 joule.
 1.15 joule.
 0.15 joule.

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Electromagnetic Field Theory
A waveguide operated below cut off frequency can be used as

None
An isolator
An attenuator
Phase shifter

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Electromagnetic Field Theory
Which of the following is multiband HF receiving antenna?

Square loop
Folded dipole
Conical horn
Log-periodic

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