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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
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Physics
A capillary tube is partially dipped vertically in a vessel containing water. Due to capillarity water rises in the tube. The height of water rise in the tube can be increased by
Decreasing the radius of the capillary tube
Increasing the radius of the capillary tube
Increasing the height of water in the vessel
None of these
The water rise in a capillary tube dipped in water is such that the weight of water in the tube above the surface of water in the vessel is equal to (balances) the upward force due to surface tension. So it is clear that if the the bore (radius) to the tube is decreased, the height of the water column in it must be greater. So, (a) is correct
Author:
rikazzz
Comment
Current Electricity
The rate of flow of charges is called
static charge
electric current
Electromotive force (EMF)
coulomb’s force
Author:
rikazzz
Comment
Physics
A passenger standing in a bus is thrown outward when the bus takes a sudden turn. This happens due to
Outward pull on him
Inertia of motion
Change in momentum
Change in acceleration
Newton’s 1st law of inertia states that an object will change its direction when a force is applied to it. Hence, when a bus takes a sudden turn the passengers are thrown outward. This is due to the inertia of direction.
Author:
rikazzz
Comment
Sound
The pitch of the sound depends upon
amplitude
loudness
area
frequency
Author:
rikazzz
Comment
Matter Properties
The up thrust of the body is equal to the
weight of liquid
mass of liquid
weight of liquid displaced
density of liquid
Author:
rikazzz
Comment
Geometrical Optics
One of the angle of a right-angled prism is
30 °
45 °
90 °
60 °
Author:
rikazzz
Comment
Current Electricity
(Electrical energy/time) is equal to
potential difference
flow of light
flow of heat
electric power
Author:
rikazzz
Comment
Physics
One light year is equal to
2 trillion miles
6 trillion miles
8 trillion miles
9 trillion miles
One light year is equal to 5.88 trillion miles (6 trillion miles approx).
Author:
rikazzz
Comment
Kinematics
Speed × time is equal to
displacement
distance
velocity
position
Author:
rikazzz
Comment
Dynamics
Law of inertia is also known as newton’s
1st law of motion
2nd law of motion
3rd law of motion
all of above
Author:
rikazzz
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