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Electromagnetic Field Theory

Electromagnetic Field Theory
The minimum height of outer atmosphere is

200 km
150 km
100 km
400 km

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Electromagnetic Field Theory
An open wire transmission line having a characteristic impedance of 600 ohms is terminated by a resistive load of 900 O. The standing wave ratio will be

1.5
4.5
3.5
2.5

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Electromagnetic Field Theory
The right hand rule for determining the direction of the induced EMF was introduced by

 Fleming
 Lenz
 Maxwell
 Faraday

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Electromagnetic Field Theory
A loop is rotating about x-axis in a magnetic field, B = BO cos(ω + φ) ay. The voltage in the loop is

 Due to transformer only.
 Due to rotating only.
 Zero.
 Due to both rotating and transformer action.

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Electromagnetic Field Theory
The hysteresis loop of a magnetic material has an area of 5 cm2 with the scale given as 1 cm = 2 AT and 1 cm = 50 mwb At 50 Hz; the total hysteresis loss is

 50 W.
 20 W.
  25 W.
 15 W.

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Electromagnetic Field Theory
An electric dipole of moment P is placed in front of a ground sphere. The change induced on the surface of the sphere is (Assume radius of sphere = R and distance from dipole to centre of sphere = d)

 PR/d.
 PR 2/d3.
 PR/d2.
 Zero.

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MORE MCQ ON Electromagnetic Field Theory

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