Entry Test MCQ :: Electrostatics

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41.

For what value of ? the electric flux has average value of those of extreme values ?

A.	60?	B.	45?
C.	90?	D.	0?

42.

Electric field due to positive charged plate is E = ?/2??. If oppositely charged plate of same amount is placed parallel to it, then resultant field contains amount of energy

A.	Q/?oA	B.	Q/e
C.	QV2	D.	Q2/C

43.

Work done in moving a point charge from one point to another point of equipotential surface is

A.	?W = 1?V	B.	?W = F?r
C.	zero	D.	W = 1/4????V

44.

Selenium becomes a conductor in light so it behaves like

A.	Semiconductor	B.	Photodiode
C.	Light emitting diode	D.	Capacitor

45.

Photocopier and inject printer are dealt in

A.	Electrostatics	B.	Charges in motion
C.	Capacitors	D.	Electric fields

46.

If a charged rod is brought closer to a gas filled balloon then

A.	Radius decreases	B.	Balloon bursts
C.	Radius increase	D.	Balloon squeezes

47.

If metallic conductor is charged negatively then its weight

A.	Remains same	B.	First increases then decreases
C.	Decreases then increases	D.	Increases for a while

48.

If mica sheet is placed between the plates of a capacitor the capacity

A.	increases	B.	decreases
C.	increases then decreases	D.	decreases then increases

49.

If two charges are increased by two times then force

A.	Decreases 9 times	B.	Increases 9 times
C.	Increases 4 times	D.	Decreases 4 times

50.

If an electrons is allowed to move along the field in a non uniform electric field then it will follow

A.	Spiral path	B.	Straight line
C.	Curved path	D.	Circular path