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11th Class Part 1 Physics Test Online MCQs With Answers
Question # 1
The unit of rotational K.E. is
Choose an answer
rAD/SEC
Js
J
Kgm2
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Question # 2
The internal energy of a piece of lead when beaten by hammer will.
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Increase
Decrease
Remains constant
Increases and then decrease
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Question # 3
A double convex lens acts as diverging lens when the object is
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At infinity
Inside the focus
A way from focus
A a large distance from lens
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Question # 4
One complete round trip of a vibrating body is called.
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Frequency
Time period
Vibration
Amplitude
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Question # 5
The unit of work in base unit is
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Kg m-1 sec-2
Kgm sec-2
Kgm2 sec-1
Kgm-1 sec-1
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Question # 6
The angle between x-axis, y-axis and z-axis is
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45°
60°
75°
90°
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Question # 7
Young in 1801 performed experiment for the first time about
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Interference
Diffraction
Polarization
Particle nature of light
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Question # 8
When hot and cold water are mixed, the entropy.
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Decreases
Increases
Remain constant
Zero
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Question # 9
When distance is plotted against the force, it is taken along
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x-axis
y-axis
z-axis
None of these
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Question # 10
A body starting from rest attains angular acceleration of 5 rad s-2 in 2 second final angular velocity will be.
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10 rad s-1
7 rad s-1
3 rad s-1
2 rad s-1
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Question # 11
A collision in which K.E. of the system is not conserved is
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Elastic collision
Inelastic collision
3rd low of motion
None of these
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Question # 12
A ball is thrown up vertically, it takes 3 sec to reach maximum height. Its initial velocity is.
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10 ms-1
12.2 ms-1
15 ms-1
29.4 ms-1
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Question # 13
The study of fluid dynamics is
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Easy
Complicated
Impossible
None of these
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Question # 14
The speed of sound in air would become double than ots speed at 10
o
C at a temperature of.
Choose an answer
313
o
C
586
o
C
859
o
C
899
o
C
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Question # 15
In case of point source the shape of wave front is.
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Plane
spherical
Circular
Eliptical
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Question # 16
If 30 waves per second pass through a medium at a speed 30 ms-1, then the wavelength is.
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30 m
15 m
1 m
28 m
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Question # 17
When a body is moving along a circular path, then such a motion is called
Choose an answer
Vibratory motion
Rotatory motion
Linear motion
None of these
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Question # 18
The periodic variations of sound between maximum and minimum loudness are called.
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Doppler's effect
reflection
Laplace correction
Beats
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