1.
One
coulomb is that unit of charge which when placed at 1m form an equal and
similar charge repels it with a force
a) 5 X 109 dyn b) 5 x 109 N
c) 9 x 109 dyn d) 9 x 109 N
2.
The
minimum charge on an abject is
a) 1 coulomb b)
1 state coulomb
c) 1.6 x 10-19 d) None
3.
Which
of the following is correct
a) J = C/V b)
J = V x A
c) J = V/A d) J = C x V
4.
One
electron volt is
a) 1.6 x 10-12 ergs b) 4.8 x 10-10 ergs
c) 300 ergs d) None
5.
Polarization
of matter is possible only for
a) Conductors b) Insulators
c) Gases d) S. conductors
6.
The
charge on the electron was calculated by
a) Faraday b)
J.J. Thomson
c) Millikon d) Einstein
7.
The
ink used in the photocopy machine
a) Black b)
Blue
c) Red d)
Tonar
8.
There
are two charges 1 uc and 6 uc, the ratio of forces acting on them will be
a) 1:25 b) 1:6
c) 1:1 d)
6:1
9.
An
electric field lines provides information about ________
a) Electric Force b) Direction
c) Medium d)
All of them
10.
If
two charges are experiencing a force of 10 N, when medium is Air, if the medium
is change whose permittivity is ‘2’ then force will be
a) 3 N b)
5 N
c) 10 N d)
0.3 N
11.
Unit
of electric flux is
a) V.m b) N/C
c) V.m2 d)
N2/C2
12.
Gauss’s
law can be applied to
a) Plane surface b) Curved surface
c) Any surface d) Closed surface
13.
Objects
may acquire an excess or deficiency of charge by
a) Electric force b) Heating
c) Striking d) By rubbing
14.
Coulomb’s
law is only applicable for
a) Big charges b) Small charges
c) Point charges d) Any charges
15.
The
force per unit charge is known as
a) Electric flux b) Electric potential
c) Electric intensity d) Electric current
16.
Electric
field intensity is also known as
a) Electric potential b) Electric flux
c) Potential gradient d) None
17.
A
basic technique when applying gauss’s law is to
a.
Assume
the field is constant in direction
b.
Assume
the field is constant is magnitude
c.
Assume
the field is constant in both magnitude and direction
d.
Construct
and imaginary surface
about the charge
18.
The
work done in moving a charge along an equipotential surface is
a.
Depends
on the path taken
b.
Greater
then zero
c.
Equal
to zero
d.
Negative
19.
In
the region where the electric field is zero, the electric potential is always
a) Positive b)
Negative
c) Constant d)
Zero
20.
The
electric intensity is expressed in unit of N/C or
a) Volts b)
Walt
c) Joules d)
V/m
21.
The
energy stored in the capacitor is
a) ½ CV2 b) ½ C2
V
c) ½ QV2 d) ½ Q2V
22.
A
charge of 0.01c accelerated through a p.d of 1000v acquires K-E
a) 10 J b) 100 J
c) 200 J d)
400 eV
23.
If
the charge on the particle is double then electric field is
a) Half b)
Double
c) Unchanged d)
None
24.
The
electric potential at a point of distance 1 m from 2 uc charge is
a) 1.8 x 106 V b) 1.8 x 106 N/C
c) 1.8 x 104 V d) 1.8 x 105 V
25.
Capacity
of a capacitor depends upon
a.
Size
of plate
b.
Distance
b/w plates
c.
Nature
of dielectric b/w plates
d.
All
of above
26.
The
area of plates of 1 farad capacitor separated 8.85mm placed in the air is
a) 109m2 b) 05m2
c) 10-9m2 d)
10-15m2
27.
A
capacitor acts as blocking elements when applied signal is
a) A.C b) D.C
c) Digital d) None
28.
Inkjet
printers works on the principle of
a) Electrostatic b) Electro
dynamics
c) Electro magnetism d) Electronics
29.
The
surface consider for gauss’s law is called
a) Closed surface b) Spherical
surface
c) Gaussian surface d) None
30.
One
giga electron volt
a) 106 ev b) 109 ev
c) 1012 ev d) 1015 ev
31.
Gravitational
force does not depends on
a) Force b)
Masses
c) Distance d) Medium
32.
Charge
to mass ratio was firsts found by
a) Millikon b) J.J. Thomson
c) Newton
33.
The
medium used b/w the plates of capacitor is called
a) Polarization b) Dielectric
c) Insulators d)
Medium
34.
The
automobiles wind shield wipers works on
a.
Electricity
b.
Cell
c.
Charging
and discharging of capacitor
d.
None
35.
Selenium
is a conductor material which when exposed to ________
a) Light b) Dark
c) Mono chromatic light d) None of these
37.
When
capacitors are connected in parallel the net capacitance will
a) Increase b) Decrease
c) Constant d) None
38.
When
two capacitors of same capacitance are connected in parallel and then in
service, the capacitance in these two cases are in ratio of
a) 1:4 b)
4:1
c) 6:1 d)
1:2
39.
S.I
unit of permittivity of free space is
a) Farad b)
Weber
c) c2/N.m2 d) c2/N.m
40.
A
capacitors may be considered as a device for
a.
Storing
energy
b.
Increasing
resistance
c.
Decreasing
resistance
d.
None
41.
If
a 10MF and 2000MF capacitors are connected in parallel the net capacitance will
be
a) 6.7 uF b)
1990 uF
c) 2010 uF d) None
42.
A
method for charging a conductor without bringing a charge body in contact with
it is called
a.
Magnetization
b.
Electrification
c.
Electrostatic
induction
d.
Electromagnetic
induction
43.
The
field inside the hollow conductor will be
a) Zero b)
Greater than zero
c) E = kq/r2 d)
Infinite
44.
One
volt is
a.
One
joule per coulomb
b.
One
dyne per coulomb
c.
One
Newton
d.
One
watt per second
45.
If
the potential difference on a surface is equal to zero b/w any two points, then
surface is said to be
a.
A
dielectric
b.
An
equipotential surface
c.
Polarized
d.
None
46.
The
electric flux through the surface of hollow sphere containing a point charge at
its center depends upon
a.
Radius
of sphere
b.
Surface
area
c.
Magnitude
of charge
d.
None
of these
47.
A
charge of 2c is in a field of intensity 2N/C, the force on the charge is
a) 1 N b)
4 N
c) 4
N d) 0 N
48.
A
line whose tangent at each point is in the direction of electric intensity at
that point is called a line of
a) Voltage b) Electric force
c) Charge d) Potential field
49.
A
unit of electric charge is
a) Volt b)
Hennery
c) Ampere d)
Coulomb
50. Coulomb
Law is also known as
a. Electrostatic Law b. Force Law
c. Inverse Square Law d. None
51. The
ratio of the force between two small spheres
with
constant charges A) in air, B) in a
medium
of
dielectric constant K is
a)
K2 : 1 b)
1 : K
c)
K : 1 d) 1 : K2
52. The force of proton in electric field of
magnitude 106 N/c is
a) 1.6 × 10-15N b) 1.6 × 109N
c) 1.6 × 1013N d) 1.6 × 1013N
53. A cylinder of radius R and length L is
placed in a uniform electric field E parallel to the cylindrical axis. The
total flux for the surface of the cylinder is:
a)
b)
Zero
c)
d)
54. In an inkjet printer the charged ink
drops are diverted by the deflection plates
a) Towards the charging electrodes
b) Towards the gutter
c) Towards a blank paper on which
the print is to
be taken
d) In inkjet printer ink can not be
charged
55. The constant K in Coulomb’s Law depends
upon
a) Nature of medium b) System of units
c) Intensity of charge d) a & b
56. How many electrons are in one Coulomb?
a) 6.2 × 10-23 b) 6.2 × 10-21
c) 1.6 × 10-19 d) Zero
57. The force between two charges in 8N. now
placed a mica of relatively 4 between two charges as a medium, the force then
reduced to
a) 2N b) 4N
c) 6N d) 8N
58. Selenium is an
a) Insulator b) Conductor
c) Semiconductor d) Photoconductor
59. Find the potential at a point, where a
charge of
1 × 10-3 coulomb is placed at a
distance of 10m is
a) 1mV b)
1.9KV
c) 1.6KV d)
0.15KV
60. In
Milikan’s experiment, we find the e/m for
a)
Atom b) Electron
c)
Proton d) Neutron
61. The charge determined by the Milikan’s
experiment is
a)
b)
c)
d)
None
62. The ratio of electrostatic force to the
gravitational force between them is of the order of
a) 1036 b) 1038
c) 1040 d) 1042
63. The magnitude of the electric field on
the surface of a sphere of radius ‘r’ having a uniform surface charge density
is
a)
b)
c)
d)
64. Of the following quantities, the one
that is vector in character is an electric
a) Charge b) Field
c) Energy d) Potential Difference
65. Dielectric has the charge of the type
inside it
a) Moving charge b) Static charge
c) Both a & b d) None of these
66. The Coulomb’s force between two charges
q1 and q2 separated by distance ‘r’ is F. If the
separation between two charges is doubled keeping charges constant, then
Coulomb’s force becomes
a) 4F b) F/4
c) F/2 d) 2F
67. The dimensions of relative permittivity
are
a) [A2T4ML-3] b) [ML-3A2T4]
c) [ML3A2T2] d) None
68. An alpha particle has twice the charge
of a proton. Two protons separated by a distance ‘d’ exert a force ‘F’ on each
other. What must be the separation between the alpha particles so that they
also exert a force ‘F’ on each other?
a) 2d b)
c)
d d)
can u please mention the correct answers of above given mcqs..
ReplyDelete2
Delete