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Electromagnetic Field Theory

Electromagnetic Field Theory
The frequency range for satellite communication is

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

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Electromagnetic Field Theory
A negative point charge q = - 40 nC is moving with velocity of 6 × 106 m/s in a direction specited by unit vector uy + 0.6 uz. Find the magnitude of force vector on the moving particle by the field B = 2 ux + 3 uy + 5 uz mT and E = 2 ux - 3 uy + 5 uz KV/m

 144 μN.
  1144 μN.
 1440 μN.
 244 μN.

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Electromagnetic Field Theory
Plane z = 10 m carries charge 20 C/m2. The electric field intensity at the origin is

  – 360 πuz v/m.
 – 10 uz v/m.
 – 72 πuz v/m.
 – 18 πuz v/m.

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Electromagnetic Field Theory
Electric flux in coulombs emanating from any surface of a cube containing C coulombs of charge at its centre is

 4πQ / 6ε.
 Q / 6ε.
 Q / 6.
 Q / 4π.

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Electromagnetic Field Theory
The magnetic vector potential due to a single conductor carrying current is

 infinite.
 finite.
 none of tha above.
 zero.

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Electromagnetic Field Theory
Find the strength of the magnetic field when a 2m long conductor is moving with a velocity 4m/s inducing an emf of 20V.

 0.5T.
 5T.
 10T.
 2.5T.

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