Q.1
Bubbles of air rise up through liquids due to
Q.2
If an ordinary glass tube and a glass capillary tube are both dipped in a beaker of water, water rises in
Q.3
The velocity of falling rain drops attains a terminal value because of
Q.4
Which one is the unit of surface tension of a liquid
Q.5
Which of the following liquids has the least density ?
Q.6
A needle or a pin floats on the surface of water because of
Q.7
Materials for rain proof coats and tents owe their water proof properties to
Q.8
Which of the following liquids is most viscous?
Q.9
Small bubbles are perfectly spherical because of
Q.10
The recoiling of gun is an example of which of the following?
Q.11
Surface tension in a liquid is due to :
Q.12
A boat loaded with rocks floats in the middle of a swimming pool. A man in the boat throws the rocks overboard. The level of water in the pool will
Q.13
A small drop of oil spreads over water because :
Q.14
The surface tension of water on adding detergent to it
Q.15
Which of the following is a result of Surface tension ?
Q.16
The odometer guage indicates
Q.17
In a refrigerator, the cooling system should always be
Q.18
Soap bubble attains spherical shape due to ________
Q.19
Water drops cannot stick to the oily surface due to
Q.20
Pitot tube is used to measure
Q.21
A spherical ball made of steel when dropped in mercury container
Q.22
The oil in the wick of an oil lamp rises up due to:
Q.23
Fog is an example of
Q.24
In uniform circular motion, the linear velocity is perpendicular to
Q.25
A bottle of sodalime is grasped by the neck and swung briskly in a vertical circle, Near which portion of the bottle do the bubbles collect?
Q.26
Which liquid is the most viscous?
Q.27
Sending a frame to a group of stations is known as
Q.28
What is the full form of ''AM' regarding radio broadcasting?
Q.29
A liquid disturbed by stirring comes to rest due to
Q.30
If a force acts upon two objects at rest, and having different masses for the same amount of time, then which one of the following will be the same for both the objects?
Q.31
If a carrier wave of 1000 kHz is used to carry the signal, the length of transmitting antenna will be equal to ________.
Q.32
In a refrigerator what produces the cooling ?
Q.33
Which of the following is preferred for accelerating electrons?
Q.34
Flywheel is an important part of a steam engine because it :
Q.35
The following particles move with same kinetic energy. Which of them has maximum momentum ?
Q.36
Rain drops acquire spherical shape due to
Q.37
The fact that two large ships travelling on close parallel courses in the same direction tend to move towards each other can be explained by
Q.38
Radio waves sent out by a radio stations are reflected by
Q.39
Bandwidth is the
Q.40
Proton carry a
Q.41
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
Q.42
Oil rises up the wick in a lamp because
Q.43
Consider the following statements :
1. There is no net moment on a body which is in equilibrium.
2. The momentum of a body is always conserved.
3. The kinetic energy of an object is always conserved.
Which of the statements given above is/are correct?
Q.44
Waves that are required for long distance wireless communication are
Q.45
A television channel is characterised by
Q.46
What is found in frequency modulation ?
Q.47
Which of the following has the highest entropy?
Q.48
Should cars have bumpers that collapse under impact?
Q.49
Negative feedback in amplifiers
Q.50
According to Rutherford's atomic model, the electrons inside an atom are
0 h : 0 m : 1 s