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Online Tests
ECAT Pre General Science Physics Online Test MCQs With Answers
Question # 1
The figure 1.007276μ shows the mass of an:
Choose an answer
Atom
Positron
Electron
Neutron
Proton
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Question # 2
The molecules or ions in a crystalline solids are
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static
not static
randomly moving
all of them
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Question # 3
If a simple pendulum is shifted from karachi to K-2 cliff, its time period
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remains the same
decreases
increases
none of them
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Question # 4
If 2.2 kilowatt power is transmitted through 1 10 ohm line at 22000 volt, the power loss in the form of heat will be
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0.1 watt
1 watt
10 watt
100 watt
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Question # 5
Work done is lowering the bucket into the well is:
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Zero
Positive
Negative
None of these
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Question # 6
What temperature is the same on Celsius scale as well as on Fahrenheit scale?
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32
°C
-32
°C
-40
°C
-212
°C
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Question # 7
A galvanometer in which the coil comes to rest quickly after the current passed through it, or the current stopped form flowing through it, is called
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dead beat galvanometer
stable galvanometer
shunt galvanometer
sensitive galvanomter
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Question # 8
Viscosity of water is ______ that of air but ___ that of plasma.
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More, more
Less, more
Less, less
More, less
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Question # 9
Physics details with the study of:
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Matter
Energy
Both of them
Human body
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Question # 10
Which of the following diodes can operate in the reverse biased condition
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photo diode
light emitting diode
photo voltaic cell
none of these
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Question # 11
Rate of flow can be expressed in
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litre/sec
litre-sec
sec/litre
sec/litre-m
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Question # 12
Fidelity refers to
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Reproduction of original sound
Reproduction of original image
Reproduction of music
Reproduction of a CD from original copy
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Question # 13
Which of the following is an example of a S.H.M?
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motion of a projectile
motion of a train along a circular path
motion of swing
electrons revolving sound the nucleus
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Question # 14
When a body moves to and fro motion, this type of motion is called
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translatory motion
circular motion
oscillatory motion
all of them
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Question # 15
On the exaust stroke, the outlet values opens. The residual gases are expelled and piston moves
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outwards
inwards
in either way
none of these
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Question # 16
If force and displacement are in opposite direction, the work done is taken as:
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Positive work
Negative work
Zero work
Infinte work
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Question # 17
In case of braking radiations, when the rate of deceleration is very large, the emitted radiation corresponds to:
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Short wavelength
Large wavelength
Very large wavelenth
Low frequency
Both (B) and (C)
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Question # 18
Velocity is a
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scalar quantity
vector quantity
constant quantity
none of them
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Question # 19
In the formula P = N
0
KT, N
0
denotes:
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Number of molecules per unit per volume
Number of moles
Number of molecules
None of these
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Question # 20
Torque is also called:
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Momentum
Linear inertia
Moment of a force
Mass
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Question # 21
Two samples A and B of a gas initially of the same temperature and pressure are compressed from a volume V to a volume V/2 such that A is compressed isothermally and B adiabatically. The final pressure
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A greater than than of B
A is equal to that of B
A is less than that of B
A is twice the pressure of B
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Question # 22
The magnitude of induced emf depends upon the:
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Rate of decrease of magnetic field
Rate of change of magnetic field
Rate of increase of magnetic flux
Constancy of magnetic field
None of these
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Question # 23
The disorder in the system increases due to the
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removal of heat
addition of heat
removal or addition of heat
none of them
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Question # 24
When platinum wire is heated, it appears cherry red at
Choose an answer
1600
°C
900
°C
1100
°C
1300
°C
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Question # 25
Charge on proton is
Choose an answer
1.59 x 10
-9
C
1.59 x 10
-7
C
-1.59 x 10
-19
C
1.59 x 10
-19
C
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Question # 26
If force and displacement are in opposite direction, the work done is taken as:
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Positive work
Negative work
Zero work
Infinite work
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Question # 27
After alpha decay the atomic number of the atom
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increase by four
decreases by two
increases by two
decrease by four
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Question # 28
Bernoulli's equation is applicable for
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turbulent flow
streamline flow
both (a) and (b)
all kinds of flows
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Question # 29
The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its
Choose an answer
I
c
will decrease
V
CE
will increase
I
C
will increase
V
CC
will increase
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Question # 30
The value of the metastable state for Neon is
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20.66eV
20.61eV
19.23eV
18.70eV
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Question # 31
Hotness and coldness of an object is represented in terms:
Choose an answer
Heat
Temperature
Chemical energy
None of these
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