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Quiz 5
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Q.1
The capacitance between two plates increases with
shorter plate area and higher applied voltage
shorter plate area and shorter distance between them
larger plate area, longer distance between plates and higher,applied voltage
larger plate area and shorter distance between plates
Q.2
Which medium has the least dielectric strength ?
Paraffin wax
Quartz
Glass
Air
Q.3
The minimum value of potential gradient in a cable occurs in
insulation
conductor
outer sheath
uniformly all over
Q.4
An electrolytic capacitor can be used for
D.C. only
AC. only
both D.C. as well as A.C.
none of the above
Q.5
A capacitor consists of two
Ceramic plates and one mica disc
Insulators separated by a dielectric
Silver-coated insulators
Conductors separated by an insulator
Q.6
The electric field intensity at a point situated 4 meters from a point charge is 200 N/C. If the distance is reduced to 2 meters, the field intensity will be
400 N/C
600 N/C
800 N/C
1200 N/C
Q.7
A mica capacitor and a ceramic capacitor both have the same physical dimensions. Which will have more value of capacitance ?
Ceramic capacitor
Mica capacitor
Both will have identical value of capacitance
It depends on applied voltage
Q.8
Dielectric strength ______ with increasing thickness
increases
decreases
remains unaltered
none of the above
Q.9
capacitors are mainly used for radio frequency tuning.
Paper
Air
Mica
Electrolytic
Q.10
If a third equal and similar charge is placed between two equal and similar charges, then this third charge will
move out of the field of influence of the two charges
remain in stable equilibrium
not be in equilibrium
be in unstable equilibrium
Q.11
A paper capacitor is usually available in the form of
tubes
rolled foil
disc
meshed plates
Q.12
A unit tube of flux is known as tube
Newton
Faraday
Michale
None of the above
Q.13
Out of the following capacitors of identical rating which one will have the smallest dimensions ?
Aluminium foil capacitor
Mica capacitor
Ceramic capacitor
Paper capacitor
Q.14
What are the units of Force?
Newtons
Coulombs
meters
Watts
Q.15
What is the charge of an electron?
+1 C
0 C
-1 C
All of above
Q.16
Electric potential is a
unmeasurable quantity
vector quantity
scalar quantity
none of above
Q.17
What is the charge of a proton?
+1 C
0 C
-1 C
None of these
Q.18
What are the units of Charge?
Newtons
Coulombs
meters
Watts
Q.19
Which of the following is NOT an insulator?
Wool
Plastic
Gold
Rubber
Q.20
The lines of force due to charged particles are
always straight
always curved
sometimes curved
none of the above
Q.21
What is the charge of a neutron?
+1 C
0 C
-1 C
None of these
Q.22
The SI unit of charge is
the ampere
the newton
the coulomb
the joule
Q.23
The value of k in coulomb's law depends upon
magnitude of charges
distance between charges
medium between two charges
all of above
Q.24
Electric field intensity is a quantity
scalar
vector
both (A) and (B)
none of the above
Q.25
A proton is
negatively charged.
not charged at all.
positively charged.
All of above
Q.26
In equation Q=CV, C is the constant of proportionality called the capacitor's
power
capacitance
heat
electric intensity
Q.27
The relative permittivity of free space is given by
1
10
100
1000
Q.28
A capacitor consists of
two insulators separated by a conductor
two conductors separated by an insulator
two insulators only
two conductors only
Q.29
In a capacitor the electric charge is stored in
metal plates
dielectric
both (A) and (B)
none of the above
Q.30
Which of the following is not a good conductor of electricity?
copper
silver
Glass
aluminum
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