More Classes
5th Class
6th Class
7th Class
8th Class
9th Class
10th Class
11th Class
12th Class
NAT I
NAT II
CSS
IQ
General Knowledge
MDCAT
ECAT
GAT General
GAT Subject
Other Links
Go to Home
Online Tests
MDCAT Physics Online Test MCQs With Answers
Question # 1
Colour of thin film will not show result from
Choose an answer
Scattering of light
Dispersion of light
Interference of light
Both a and b
Previous
Skip
Next
Question # 2
Application of photoelectric effect is
Choose an answer
Photo diode
Photo transistor
Photocell
None of these
Previous
Skip
Next
Question # 3
The pressure of a given mass of gas, at constant temperature, is inversely proportional to its volume.
The above statement states which gas law?
Choose an answer
Boyle's law
Dalton's law
Charles Law
Newton's Law
Previous
Skip
Next
Question # 4
When an observer is standing on a railway platform, the pitch of the whistle of an approaching train is heard to be
Choose an answer
higher
lower
unchanged
all of them
Previous
Skip
Next
Question # 5
If two non zero vectors A and B obey the relation |A + B| = |A - B|.then the angle between them is:
Choose an answer
120°
90°
60°
0°
Previous
Skip
Next
Question # 6
Fundamental forces of nature are
Choose an answer
weak nuclear force
strong nuclear force
electromagnetic force and weak nuclear force
all of them
Previous
Skip
Next
Question # 7
According to the law of conversion of linear momentum, the total linear momentum of an isolated system
Choose an answer
increases
decreases with time
remains constant
none of them
Previous
Skip
Next
Question # 8
Resistor is a device which converts electrical energy to
Choose an answer
heat energy
chemical energy
elastic energy
all of them
Previous
Skip
Next
Question # 9
1 year = ______.
Choose an answer
3.1536 x 10
7
s
3.1536 x 10
-7
s
3.1536 x 10
10
s
3.1536 x 10
-10
s
Previous
Skip
Next
Question # 10
An object is placed between the focus and the optical center of the convex lens. The image formed is
Choose an answer
Real, erect and magnified
Virtual, inverted and magnified
Virtual, erect and diminished
Virtual, erect and magnified
Previous
Skip
Next
Question # 11
Classical physics is still valid in
Choose an answer
Very small particles
Fast moving particles
Ordinary process
None of these
Previous
Skip
Next
Question # 12
The colour of platinum wire changes to yellow at
Choose an answer
1000
o
C
1200
o
C
1300
o
C
1800
o
C
Previous
Skip
Next
Question # 13
Suppose the water flows out from a pipe at 3 kgs
-1
and its velocity changes from 5 ms
-1
to zero on striking the ball, then force is
Choose an answer
5.3 N
15 N
17.3 N
19.2 N
Previous
Skip
Next
Question # 14
The best conductor is:
Choose an answer
Silver
Copper
Aluminium
Both (B) and (C)
None of them
Previous
Skip
Next
Question # 15
In an ac circuit with voltage V and current 1 the power dissipated is
Choose an answer
VI
1/2 VI
1/√2 VI
Depends on the phase between V and I
Previous
Skip
Next
Question # 16
In depletion region
Choose an answer
Holes are not present
Electrons are not present
Both are not present
None of these
Previous
Skip
Next
Question # 17
The viscosity of water is
Choose an answer
0.019 x 10
-3
Nsm
-2
0.801 x 10
-3
N-sm
-2
6.29 x 10
-3
N-sm
-2
0.081 x 10
3
N-sm
-2
Previous
Skip
Next
Question # 18
A.C has replaced D.C in our homes because
Choose an answer
A.C is more safe
A.C can be transmitted economically
production cost of D.C is more
A.C can be produced easily
Previous
Skip
Next
Question # 19
What is the maximum possible efficiency of a steam engine that uses steam at a temperature of 100
°C on a day when the temperature is 300K? (round off the answer to the nearest whole number?
Choose an answer
19%
20%
80%
81%
Previous
Skip
Next
Question # 20
In a never system, the repeaters are placed at about
Choose an answer
50 km
75 km
100 km
125 km
Previous
Skip
Next
Question # 21
The decay constant of a radioactive element is 1.5 x 10
-9
per second.Its mean life in seconds will be
Choose an answer
1.5 x 10
9
4.62 x 10
8
6.67 x 10
8
10.35 x 10
8
Previous
Skip
Next
Question # 22
The practical unit of current is:
Choose an answer
Ampere
Ohm
Coulomb
Volt
None of these
Previous
Skip
Next
Question # 23
Conductors are those materials in which energy gap is
Choose an answer
very large (several eV)
very narrow (= 1eV)
either of them
none of them
Previous
Skip
Next
Question # 24
A heat engine converts thermal energy to mechanical work which is
Choose an answer
All
Partly
Some
None of these
Previous
Skip
Next
Question # 25
A conducting rod is moved through a uniform magnetic field The emf induced across its ends does not depend upon
Choose an answer
Magnetic flux density
Length of the rod
Orientation of rod
Thickness of the rod
Previous
Skip
Next
Question # 26
Applied voltage across the X plates of CRO is provided by
Choose an answer
Provided by circuit that is built in CRO
Sweep generator
Time base generator
All are true
Previous
Skip
Next
Question # 27
A body of mass 5 kg is moving in a circle of radius 1 m with an angular velocity of 2 rad/s.The centripetal force is
Choose an answer
10 N
20 N
30 N
40 N
Previous
Skip
Next
Question # 28
A simple pendulum consists of a
Choose an answer
Small heavy bob
Big metallic bob
Big light bob
None of these
Previous
Skip
Next
Question # 29
When a silicon crystal is doped with a trivalent element, such an extrinsic semi-conductor is called
Choose an answer
p-type semi-conductor
n-type semi-conductor
either of them
none of them
Previous
Skip
Next
Question # 30
The energy of the 4th orbit in hydrogen atom is
Choose an answer
2.5 eV
- 3.5 eV
- 0.85 eV
- 13.6 eV
Previous
Skip
Next
Question # 31
The principle of rocket motion is based on the
Choose an answer
First law of motion
Second law of motion
Third law of motion
None of these
Previous
Skip
Next
Question # 32
Which component of weight balance the tension T in the string
Choose an answer
mg cos θ
mg sin θ
- mg cos θ
None of these
Previous
Skip
Next
Question # 33
Low penetration power
Choose an answer
α-particle
β-particle
γ-particle
None of these
Previous
Skip
Next
Question # 34
The SI unit of conductivity is
Choose an answer
ohm m
ohm
-1
m
-1
ohm m
-1
ohm
-1
m
Previous
Skip
Next
Question # 35
Sound in air exhibits all the order properties of waves except
Choose an answer
Deflection
Diffration
Refraction
Polarization
Previous
Skip
Next
Question # 36
The collection time of electrons and holes of solid state detector is much less than gas filled counters, therefore it counter
Choose an answer
Fast
Low
Very low
None of these
Previous
Skip
Next
Question # 37
Which of the following forces have long range
Choose an answer
Strong nuclear force
Electromagnetic force
Weak nuclear force
All are true
Previous
Skip
Next
Question # 38
The value of '
γ' for monatomic gas is
Choose an answer
1.40
1.67
1.17
1.29
Previous
Skip
Next
Question # 39
The angle between A and B is θ.The value of the triple product A,(B x A) is:
Choose an answer
A
2
B
Zero
A
2
B sin θ
A
2
B Cos θ
Previous
Skip
Next
Question # 40
A steel bar can bear a load of 20 tons. If the thickness of bar is double, then for the same depression it can bear a load of:
Choose an answer
40 ton
80 ton
160 ton
5 ton
Previous
Skip
Next
Question # 41
A very high energy photon interact with matter and changes into
Choose an answer
Electron
Positron
Pair of electron and positron
None of these
Previous
Skip
Next
Back