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25 questions
A capacitor consists of two _____ separated by a small distance.
conductors
insulators
none of these
A capacitor stores electrical energy in the form of _____ field.
magnetic
electric
gravitational
The ratio of charge to the potential difference of a capacitor is _______.
resistance
inductance
capacitance
A dielectric material is a/an _____.
insulator
conductor
semiconductor
The relative permittivity of vacuum is _____.
zero
infinite
one
The electric field between two conductors of a capacitor is ____ electric field.
uniform
non-uniform
none of these
The charge of a capacitor is found to be directly proportional to its _____.
capacitance
distance
potential difference
A parallel-plate capacitor consists of ______ parallel metal plates.
one
two
three
The greatest capacitance can be obtained by connecting several capacitors in _____.
parallel
series
none of these
When the capacitors are connected in series each capacitor has the same _____.
voltage
energy
charge
The dielectric constant of glass is greater than ______.
water
ammonia
air
A simple capacitor is ____ capacitor.
parallel-plate
cylindrical
electrolyte
The capacitance is ______ when higher dielectric material is placed between its conductors.
decreased
increased
constant
The unit farad is the same as _____.
volt per coulomb
coulomb per volt
newton per meter
Capacitors are connected in series to get the ____ capacitance.
maximum
constant
minimum
When Q on a capacitor is doubled, its capacitance C ______.
doubles
remains constant
is halved
If the potential difference across a capacitor is doubled, its energy stored is ______.
doubled
tripled
4 times greater
If one plate of the capacitor has a charge of +Q, then the other has a charge of _______.
-Q
+Q
+2Q
The unit of surface charge density is _____.
Wm−2
Jm−2
Cm−2
When three 12µF capacitors are connected in series the equivalent capacitance is _____.
4µF
36µF
3µF
The charge of a capacitor is directly proportional to its ______.
capacitance
potential difference
none of these
For a vacuum κ=1 and for other media ____.
κ>1
κ<1
κ=0
The energy stored in a capacitor consists of _____ parallel metal plates.
W = ½ QV
W= ½ QV2
W= ½ Q2V
1 CV-1 is expressed as 1 _____.
newton(N)
farad(F)
joule(J)
The insulating materials are called _____.
dielectric materials
conductors
none of these
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