Paper for Entry Test Preparation
Physics 2nd year Chapter No. 12
Total marks:- 160 Time
allowed 30 minutes
Note:- Fill
the appropriate answer of the following questions in the answer sheet. Double
filling and erasing is not allowed. Each question carries equal marks and for
each wrong answer minus one is awarded
1) The SI unit of constant ‘k’ in Coulomb’s law is:
a)
Nm2C-2 b)
C2N-1m-2 c)
C2N-2m-2 d)
Nm-2C2
2) The concept of electric field theory was
introduced by:
a)
Michael Faraday b) Newton c) Einstein d) Kepler
3) Electric field strength is defined as:
a)
Work done on unit charge b)
Force exerted on unit charge
c)
Distance covered by unit charge d)
Power exerted by unit charge
4) Electric intensity at a place due to a charged
conductor is a:
a)
Scalar quantity b)
Vector quantity c)
Dimensionless quantity d) Both (a)
and (c)
5) The SI unit of charge is:
a)
Ampere b)
Watt c)
Coulomb d)
Volt
6) The electric field lines start from:
a)
Positive charge b)
Negative charge c) Either
(a) or (b) d) From
neutral end
7) By placing a dielectric in b/w the charges, the
electrostatic force b/w them:
a)
Is always reduced b) Is not
affected c) Is
increases on million time d) Non of all
8) The value of relative permittivity of different
dielectrics are:
a)
Equal b)
Different c)
Greater than one d)
Smaller than one
9) Field lines are closer to each other in the
region where the field is:
A)
Stronger b)
Weaker c)
Much weaker d) Absent
10) Static electricity is produced by the transfer
of:
a)
Electrons b)
Protons c)
One fluid d)
Two fluids
11) Xerography means:
a)
Dry writing b) Wet
writing c) Poor
writing d)
Excellent writing
12) The inkjet printer ejects a thin stream of:
a)
Water b)
Oil c)
Ink d)
Any of above
13) An inkjet printer uses in its operation:
a)
Neutrons only b)
Mesons only c)
Positrons and photons d) An
electric charge
14) The number of field lines passing through a
certain element of area is known as:
a)
Electric intensity b) Electric flux c) Lines of forces d) Charge
in that element
15) The number of field lines passing through unit
area held perpendicular to the field lines represent:
a)
Flux in that region b)
Intensity of the field c)
Charge d)
Area of the region
16) The electric flux through any surface depends
upon:
a)
Intensity of electric field b) Area
of the surface c) Angle b/w
area and surface d) All of these
17) Total spherical surface area is given by the
formula:
a)
4/3 pr2 b) 4pr3 c) 4pr2 d) 4/3 pr
18) The flux through any closed surface is 1/eo
times the total charge enclosed in it. This statement is called:
a)
Coulomb’s law b)
Gauss’s law c)
Faraday’s law d)
Newton’s law
19) A field free region is found:
a)
Near the outer surface of a hollow charges metal sphere b) In the interior of solid metal uncharged sphere
c)
In the interior of a hollow charged sphere d)
Both (a) and (b)
20) Gaussian surface is always:
a)
Rectangular b)
Spherical c)
Cylindrical d)
Any of these
21) The surface density of charge is defined as:
a)
Charge per volume b) Mass per
volume c)
Charge per area d) Mass
per area
22) Another name foe electric potential energy per
unit charge is given by:
a)
Electric intensity b)
Potential gradient c)
Electric flux d)
Potential difference
23) Coulomb multiplied by volt gives the unit
called:
a)
Farad b)
Ohm c)
Second d)
Joule
24) The potential at a point situated at a distance
of 9 m from a charge of 10-6 Coulombs is:
a)
1 mV b)
1mV c) 1 nV d) 1 V
25) Which of the following force is the weakest:
a)
Nuclear strong force b) Nuclear
weak force c) Gravitational
force d) Electrostatic force
26) Which of the following force is only attractive:
a)
Nuclear weak force b)
Electrostatic force c) Gravitational
force d) Magnetic force
27) The apparatus of Millikan’s experiment also
contains:
a)
An atomizer b) Oil
droplet c) Lens d) All of
above
28) The ability of a capacitor to store the charge
is called:
a)
Resistance b)
Capacitance c)
Reactance d)
Impendance
29) The symbol er
denotes:
a)
Relative permittivity b)
Dielectric constant c)
Permittivity d)
Both (a) and (b)
30) Energy density is defined as the energy per
unit:
a)
Length b)
Area c)
Volume d)
Charge
31) The energy stored in the capacitor is in the
form of:
a)
Gravitational P.E b)
Electric P.E c)
Kinetic energy d)
Solar energy
32) The unit of capacitance is:
a)
Faraday b)
Ampere c)
Ohm d)
Farad
33) The capacitance of a parallel plate capacitor is
C. When then separation b/w the plates is halved, then its capacitance is:
a)
4C b)
2C c)
C/2 d)
C/4
34) In case of a parallel plate capacitor, 1/2er
eo
E2 gives:
a)
Energy stored in a capacitor b)
Energy per unit volume of the gap
c)
Energy density d)
Energy per unit area
35) Coulomb per volt is also called:
a)
Joule b)
Ohm c)
Farad d)
Kohm
36) Capacitance of a capacitor depends upon:
a)
Area of its plate b)
Separation b/w them c) Medium
b/w them d) All of above
37) The dielectric is also called:
a)
Semiconductor b)
Conductor c)
Insulator d)
Either (b) or (c)
38) Due to polarization of the dielectric b/w the
plates of a charged capacitor, the electric intensity b/w the plates:
a)
Increases b)
Decreases c)
Remain unaffected d) Either
(a) or (b)
39) The voltage across the capacitor at any instant
can be obtained by:
a)
Dividing C by q b)
Multiplying q with C c) Dividing
q by C d) Adding q into C
40) When a charges capacitor is being discharged,
the positive charge moves from:
a)
Its positive to negative plate b)
Battery to capacitor
c)
Its negative plate to positive plate d)
Capacitor to battery
Subscribe to:
Posts (Atom)