Q.1
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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