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Online Tests
ECAT Pre General Science Physics Online Test MCQs With Answers
Question # 1
Amount of heat required to raise the temperature of a body through 1 K is called its
Choose an answer
Specific heat
Water equivalent
Thermal capacity
Entropy
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Question # 2
The waves in which the particles of the medium are displaced in a direction perpendicular to the direction of propagation of waves are known as
Choose an answer
longitudinal waves
transverse waves
non-mechanical waves
none of them
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Question # 3
If water in a closed bottle is taken up to the moon and opened, the water gets
Choose an answer
Freeze
Boiled
Dissociated into O
2
and H
2
Evaporated
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Question # 4
In the doping process, the ratio of the doping atoms to the semi conductor atom is
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1 to 10
1 to 10
3
1 to 10
6
1 to 10
9
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Question # 5
If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be
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Equal to 1
Less than 1
Greater than 1
Infinity
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Question # 6
The fluid is incompressible, if itsdensity is
Choose an answer
zero
constant
very high
very small
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Question # 7
10
6
electrons are moving through a wire per second, the current developed is
Choose an answer
1.6 x 10
-19
1 A
1.6 x 10
-15
A
10
6
A
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Question # 8
The phase angle of a series RLC circuit at resonance is
Choose an answer
180
°
90
°
0
°
None of the these
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Question # 9
When an electron enters in a magnetic field right angle to its motion, the magnitude of its velocity will be
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changed
zero
unchanged
none of these
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Question # 10
Laplace formula is derived from
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Isothermal change
Adiabatic change
Isobaric change
None of these
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Question # 11
During the nuclear changes, the law/s of conservation that hold/s are that of:
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Charge
energy
Momentum
Mass
All of these
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Question # 12
Internal energy is the sum of all the forms of
Choose an answer
K.E
P.E
both of them
none of them
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Question # 13
In a normal healthy person the value of systolic pressure is
Choose an answer
75 torr
80 torr
120 torr
all of them
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Question # 14
At the present time, the main frontiers of fundamental science are
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2
3
4
5
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Question # 15
The charge carriers in gases are
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electrons
ions
protons
ions and electrons
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Question # 16
CRO deflects the beam of
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proton
a-particle
electron
neutron
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Question # 17
The number of vibrating body at any instant from its equilibrium position is called
Choose an answer
displacement
frequency
amplitude
time period
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Question # 18
Swimming is based on the principle of
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Newton's 1st law
Newton's 2nd law
Newton's 3rd law
All
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Question # 19
With the increase of temperature viscosity
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Increase
Decrease
Remains same
Doubles
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Question # 20
Specific resistance of a wire depends upon
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Length
Cross-section area
Mass
None
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Question # 21
The SI unit of strain is
Choose an answer
N
Dynes
Pascal
Dimensionless
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Question # 22
The electric field due to an infinite long thin wire at a distance R varies as
Choose an answer
1/R
1/R
2
R
R
2
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Question # 23
An oscillating body oscillates due to:
Choose an answer
Applied force
Restoring force
Frictional force
None of these
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Question # 24
The distance covered by the wave in one second is:
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Wave number
Wave length
Frequency
Wave speed
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Question # 25
A body of mass 5 kg is acted upon by a constant force of 20 n for 7 seconds. The total change in momentum will be:
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10 NS
100 NS
140 NS
200 NS
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Question # 26
In the force applied is parallel to the direction of motion, then work done is:
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Maximum
Minimum
Zero
None of these
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Question # 27
Vibratory motion is always under
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Applied force
Restoring force
Periodic force
Gravitational force
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Question # 28
Slope of velocity-time graph represents:
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Acceleration
Speed
Torque
Work
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Question # 29
A condenser of capacity 50
μ
F is charged to 10 V.The energy stored is
Choose an answer
1.25 x 10
-3
J
3.75 x 10
-3
J
2.5 x 10
-3
J
5 x 10
-3
J
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Question # 30
The motional e.m.f depends upon the
Choose an answer
Length of a conductor
Strength of a magnet
Speed of the conductor
All of the above
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