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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
1.15 joule.
0.015 joule.
0.015 joule.
0.15 joule.
1.15 joule.
0.015 joule.
0.015 joule.
0.15 joule.
Answer
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Related Question
Electromagnetic Field Theory
Unit of electric flux density is
coulomb / meter2.
weber / meter2.
farad / meter.
coulomb.
coulomb / meter2.
weber / meter2.
farad / meter.
coulomb.
Answer
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Electromagnetic Field Theory
Radiation intensity in a given direction is the
None of these
Power radiated per square metre
Power radiated per unit solid angle in that direction
Energy radiated per square metre
None of these
Power radiated per square metre
Power radiated per unit solid angle in that direction
Energy radiated per square metre
Answer
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Electromagnetic Field Theory
The radiation pattern of Hertzian dipole in the plane perpendicular to dipole is a
Circle
None of these
Figure of eight
Null
Circle
None of these
Figure of eight
Null
Answer
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Electromagnetic Field Theory
A magnetic vector potential is given by the expression A = (- cos x) (cos y) uz. The flux density at the origin is
– 2 ux.
0.
– uy.
2 ux.
– 2 ux.
0.
– uy.
2 ux.
Answer
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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.
150.
450.
600.
300.
150.
450.
600.
Answer
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