The electric field at a point situated at a distance d from straight charged conductor is
proportional to d
inversely proportional to d
inversely proportional to d
none of the above
Q.2.
What are the three subatomic particles?
Electrons, Neutrons, and Protons
Electrons, Protons, and Nucleus
Q.3.
Neutral atoms contain equal numbers of positive __ and negative __.
Electrons and Protons
Protons and Electrons
Neutrons and Electrons
Protons and Neutrons
Q.4.
Which net charge could be found on an object?
4.8 x 10-19 C
1.8 x 10-19 C
3.0 x 10-19 C
2.8 x 10-19 C
Q.5.
Good insulators
have electrons free to move around
have tightly bound electrons
have electrons do not move at all
All of above
Q.6.
SI unit of electric potential is
C-1
J-1
JC-1
JC-4
Q.7.
Coulomb's law is only true for point charges whose sizes are
medium
very large
very small
large
Q.8.
Due to electrostatic induction in aluminum rod due to charged plastic rod, the total charge on the aluminum rod is
zero
positive
negative
dual
Q.9.
Dielectric strength of mica is
10 to 20 kV/mm
30 to 50 kV/mm
50 to 200 kV/mm
300 to 500 kV/mm
Q.10.
SI unit of capacitance is
Newton(N)
coulomb(C)
Pascal(Pa)
farad(F)
Q.11.
What is the symbol for distance?
F
q
d
D
Q.12.
If one unit of charge given to the plates of a capacitor produces a potential difference of 1 volt between the plates of the capacitor then its capacitance would be
1/2 farad
1 farad
2 farad
3 farad
Q.13.
Opposite charges
attract each other.
repel each other.
Q.14.
If F is the force acting on the test charge qo, the electric field intensity E would be given by
E = F - qo
E = F/qo
E = F + qo
E = qo/F
Q.15.
The ability of a capacitor to store charge depends upon
area of plates
distance between plates
type of dielectric used
all of above
Q.16.
SI unit of electric intensity is
C-1
N-1
NC-1
NC-4
Q.17.
Plastic rod rubbed with fur and glass rod rubbed with silk
repel each other
mix up with each other
attract each other
none of above
Q.18.
The power dissipated in a pure capacitor is
zero
proportional to applied voltage
proportional to value of capacitance
both (B) and (C) above
Q.19.
Compared to insulators, metals are better conductors of electricity because metals contain more free
protons
electrons
positive ions
negative ions
Q.20.
Which of the following materials has the highest value of dielectric constant?
Glass
Vacuum
Ceramics
Oil
Q.21.
The dissipation factor of a good dielectric is of the order of
0.0002
0.002
0.02
0.2
Q.22.
Dielectric strength of a material depends on
moisture content
temperature
thickness
all of the above
Q.23.
Which is the SI unit of Force?
Newton
Ohm
Joule
Coulomb
Q.24.
Two like charges
neutralize each other.
repel each other.
must be neutrons.
attract each other.
Q.25.
What is the symbol for force?
F
f
N
n
Q.26.
Two similar metal spheres, A and B, have charges of +2.0 x 10-6 coulomb and +1.0 x 10-6 coulomb, respectively. The magnitude of the electrostatic force on A due to B is 4.newtons. What is the magnitude of the electrostatic force on B due to A?
2.0N
4.0N
8.0N
1.0N
Q.27.
Calculate the force exerted between two charged objects separated by a distance of 0.6 m. One object has a charge of -5 C and the other has a charge of +2.0 C.
1.5E-11 N attracted
2.5E-11 N repelled
2.5E11 N attracted
7.5E-10 N attracted
Q.28.
The SI unit of electric potential is
volts
ohm
coulomb
newton
Q.29.
Electroscope can be charged by
convection
radiation
conduction
all of above
Q.30.
Dielectric strength of medium
increases with rise in temperature
increases with moisture content
is same for all insulating materials
none of the above
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