Entry Test MCQ :: Electrostatics

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31.

SI unit of permitivity of free space is

A.	Nm2C2	B.	N-1mC-2
C.	NmC-1	D.	N-1m-2C2

32.

Value of ?r for various dielectrics is always

A.	less than unity	B.	equal to unit
C.	larger than unit	D.	no hard and fast rule

33.

Electric intensity at infinite distance from the point charge is

A.	zero	B.	infinite
C.	positive	D.	negative

34.

Which one of the following can be taken as the measure of electric intensity ?

A.	F/A	B.	?/A
C.	???/A	D.	q/??A

35.

Electric flux due to a point charge +q is

A.	1/4II?? . q/r	B.	q/??
C.	1/4II?? . q/r2	D.	4II??

36.

N/C =

A.	V/A	B.	J/V
C.	V/m	D.	A/m

37.

A charge of 0.10C accelerated through a potential difference of 1000V acquires kinetic energy

A.	200J	B.	100J
C.	1000J	D.	100 eV

38.

A capacitor is a perfect insulator for

A.	direct current	B.	alternating current
C.	both for the direct and alternating current	D.	none of above

39.

Three capacitors C1 C2 and C3 are connected in parallel as in the Fig. The equivalent capacitance will be

A.	8?F	B.	0.8?F
C.	1?F	D.	16?F

40.

In a charged capacitor the energy resides in

A.	magnetic hield	B.	electric field
C.	nuclear field	D.	gravitational field