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Electromagnetic Field Theory

Electromagnetic Field Theory
XEROX machine is working on

 electrostatic effect.
 heating effect of current.
 magnetic effect.
 peltier effect.

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Electromagnetic Field Theory
Which of this statement is not characteristic of a static magnetic field

 it has no sink or sources.
 it is solenoidal.
 it is conservative.
 magnetic flux lines are always closed.

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Electromagnetic Field Theory
The electrical field strength at a distance point A due to a point charge +q, located at the origin, is 100 µl v/m. If the point charge is now enclosed by a perfectly conducting metal sheet sphere whose centre is at origin, A, outside the sphere, becomes

 None of above.
 100 μ v/m.
 - 100 μ v/m.
 0.

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Electromagnetic Field Theory
The static electric field in a conductor is

Unity
Infinity
Zero
None of these

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Electromagnetic Field Theory
A sphere of 20 cm radius contains electrical charge of density 2/(r sinθ) c/m3. What is the total charge contained within the sphere?

 0.335 C.
 None of above.
 0.335/sinθ c.
 0.

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Electromagnetic Field Theory
Which antenna is a wideband antenna?

None of these
Marconi antenna
Hertz antenna
Folded dipole

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