Q.1
Amount of water vapour in the atmosphere is measured in terms of
Q.2
A particle dropped from the top of a tower uniformly falls on ground at a distance which is equal to the height of tower. Which of the following paths will be traversed by the particle ?
Q.3
A particle is thrown vertically upward. When it reaches the highest point, it has
Q.4
A person does some work of 1,000 J in 2 s. His power will be ________
Q.5
The value of coefficient of restitution in perfectly elastic collision is
Q.6
The motion of a body around a circular path is an example of
Q.7
What should a person on a freely rotating turn table do to decrease his (angular) speed ?
Q.8
The ''four stroke petrol engine' is based on
Q.9
When a detergent is added to pure water, its surface tension
Q.10
Pieces of camphor placed on water move about rapidly. This is because of
Q.11
For which one of the following does the centre of mass lie outside the body?
Q.12
When a pail of water is swung in a vertical circle, the water does not fall out at the top of the loop when the speed is
Q.13
When the milk is churned vigorously the cream from it is separated out due to
Q.14
Damp clothes are dried in spin dryers by the action of
Q.15
Two metallic plate of equal thickness and coefficient thermal conductivity K1 and K2 put together face to face. A common plate is constructed. What is equivalent K?
Q.16
A spring is an example of which of these
Q.17
For an ideal gas, which one of the following statements does not hold true?
Q.18
Due to temperature variation along a conductor, potential variation occurs along it. This phenomenon is known as
Q.19
Which results in an increase in power?
Q.20
A sphere rolls down on two inclined planes of different angles but same height, it does so
Q.21
The spring balance works on the principle of ________ .
Q.22
A metal plate with a circular hole at the centre is heated. What will happen to the area of the hole ?
Q.23
What is unit of Viscosity ?
Q.24
The device which converts sound energy into electrical energy is called
Q.25
The hair of shaving brush clings together when removed from water due to
Q.26
Fat can be seperated from milk in a cream seperator because of :
Q.27
In case of uniform circular motion, the acceleration is
Q.28
A tank filled partially with a liquid is subjected to a uniform horizontal acceleration. Which of the following is true for the surface of liquid in the tank?
Q.29
A copper disc has a hole. If the disc is heated, the size of the hole
Q.30
Which measurement describes the pressure of a gas?
Q.31
The transport phenomenon occurs only in ________ state of a gas and is ________
Q.32
What device converts light energy to electrical energy?
Q.33
In a water lifting electric pump, we convert
Q.34
If a body moves with a constant speed in a circle
Q.35
Air is said to be saturated when
Q.36
At constant pressure, the volume of a fixed mass of a gas is directly proportional to its absolute temperature. It is the statement of
Q.37
Supercooling is cooling of liquid ________
Q.38
A real gas can act as an ideal gas in
Q.39
The combined gas law relates which of the following?
Q.40
The primary agent of contact metamorphism is
Q.41
Charles's law is based on
Q.42
The lift of an aeroplane is caused by
Q.43
Which of the following instrument is used to measure Soil Water Tension?
Q.44
The oil in the wick of lamp rises due to
Q.45
Which of the following devices can be used to detect radiant heat ?
Q.46
Water will not be vapourised if
Q.47
Liquids and gases never show
Q.48
A circular plate, a cube and a sphere, all made up of same material and having the same
mass, are heated to 300°C and left in a room. Which of them will have the slowest rate of cooling?
Q.49
An ideal gas cannot be
Q.50
The instrument that measures and records the relative humidity of air is
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