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Physics
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Work and Energy
100
Dynamics
87
Kinematics
98
Transfer of Heat
51
Turning Effect of Forces
62
Gravitation
46
Matter Properties
94
Thermal Properties of Matter
103
Atomic and Nuclear Physics
101
Basic Electronics
101
Current Electricity
187
Electromagnetism
101
Electrostatics
123
Geometrical Optics
204
Information and Communication Technology
100
Simple Harmonic Motion and Waves
96
Sound
108
Show/Hide Answers
Dynamics
If the string is stretched by two opposite forces of 10 N then tension in the string is
5N
20 N
10 N
zero
Author:
rikazzz
Comment
Physics
Which one of the following is a non-dimensional quantity?
Gas constant
Strain
Co-efficient of viscocity
Plank’s constant
Strain is a non-dimensional quantity.
Author:
rikazzz
Comment
Transfer of Heat
Thermal conductivity of water is
1.58 Wm
-1
 K
-1
0.59 Wm
-1
 K
-1
0.026 Wm
-1
 K
-1
0.75 Wm
-1
 K
-1
Author:
rikazzz
Comment
Physics
Identify the vector quantity from the following
Heat
Angular momentum
Time
Work
Angular momentum is a vector quantity.
Author:
rikazzz
Comment
Geometrical Optics
The condition in which the image is formed behind the retina is called
Farsightedness
Nearsightedness
image defect
blind spotting
Author:
rikazzz
Comment
Physics
Which of the following is not caused by atmospheric refraction of light ?
Sun appearing red at sunset
Twinkling of stars at night
Sun appearing higher in the sky than it actually is
Sun becoming visible two or three minutes before actual sunrise
The twinkling of stars and variation in size of the Sun are due to atmospheric refraction of light. Besides, refraction is also responsible for the sun to look during sunset and sunrise. It is also responsible for the sun becoming two or three minutes before actual sunrise. The sun appears higher or lower in the sky due to the changing position of the Earth relative to the Sun.
Author:
rikazzz
Comment
Current Electricity
A fuse is always connected with live wire in
parallel
series
combination
alternative circuit
Author:
rikazzz
Comment
Simple Harmonic Motion and Waves
If speed of radio wave is 4×10
8
ms
-1
, where 1M = 10
6
. The wavelength of the radio waves transmitted at 80Mhz will be
6 m
10 m
8 m
5 m
Author:
rikazzz
Comment
Physics
Indicate the false statement about the resistance of a wire
It depends on material of wire
It is directly proportional to the length of wire
It is directly proportional to the area of cross-section of wire
Resistance of metallic wire increases with increase in temperature
It is directly proportional to the area of cross-section of wire is a false statement.
Author:
rikazzz
Comment
Current Electricity
If the electromotive force of the battery is 5 V, the total energy supplied by the battery is
2.5 joules
5 joules
1 joule
10 joules
Author:
rikazzz
Comment
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