Q.1
If there is a circular hole in a metal plate, what happens to the radius of the hole when the plate is heated?
Q.2
For accurate scientific work, temperatures are often measured by
Q.3
In heating frozen foods in sealed pouches in a microwaves, why do you first poke holes in the pouch?
Q.4
The ''Greenhouse effect' is mainly due to increase in atmospheric
Q.5
Thermohaline circulation is mainly due to
Q.6
Blotting paper absorbs ink due to
Q.7
Name the process by which bubbles from liquid are formed?
Q.8
Shock-absorbers are usually made of steel as it :
Q.9
Relative humidity is expressed as
Q.10
The humidity of the air depends upon
Q.11
Super cooling stands for cooling of a liquid :
Q.12
The spring constant of a spring depends on its
Q.13
Which of the following device is best suited for measuring the temperature inside metallurgical furnaces?
Q.14
When two ice cubes are pressed together, they join to form one cube. Which one of the following helps to hold them together?
Q.15
Which of the following is an example of simple harmonic motion?
Q.16
Boyle's law is a relationship between
Q.17
Which of the following device is used to measure humidity?
Q.18
Which set of conditions represents the easiest way to liquify a gas ?
Q.19
The dimensional formula ML–1T–2 corresponds to
Q.20
Amount of water vapour (gaseous) in a given volume of air (cubic metre) is known as:
Q.21
According to special theory of relativity the mass of a particle
Q.22
Bolometer is used to measure
Q.23
In a freezer ice cubes will be formed more quickly in trays made of
Q.24
The average kinetic energy of the molecules of an ideal gas is directly proportional to
Q.25
The dimensional formula for universal gravitational constant is
Q.26
Which one of the following physical quantities has the same dimensions as that of Planck's constant?
Q.27
A cycle tyre bursts suddenly. This represents an :
Q.28
If cream is removed from milk, its density
Q.29
A falling drop of rain water acquires the spherical shape due to
Q.30
Which of the following is not a property of heavy water ?
Q.31
Two rods, one of copper and other of steel, experience the same upthrust when placed in water.Thus, both have
Q.32
Which of the metals has the maximum thermal conductivity?
Q.33
Which law relates to the ideal gas law?
Q.34
Which of these liquids has the highest viscosity?
Q.35
Boyle's law relates to
Q.36
Steel is more elastic than rubber because it :
Q.37
Period of oscillation of 3 cm microwaves in seconds is
Q.38
When a person sitting on a swing stands up on the swing, the frequency of oscillation
Q.39
Which has the lowest albedo?
Q.40
Why the needle of iron swims on water surface when it is kept gently ?
Q.41
Rise of oil a wick is due to
Q.42
If ice floating on water in a vessel melts, the water level in the vessel ________ .
Q.43
On a clean glass plate a drop of water spreads to form a thin layer whereas a drop of mercury remains almost spherical because
Q.44
A solid ball of metal has a spherical cavity inside it. When the ball is heated the volume of the cavity will
Q.45
The absorption of ink by blotting paper involves
Q.46
Water from soil enters into the root hairs owing to :
Q.47
If the diameter of a capillary is doubled, then the rise of water in it will be
Q.48
A system exhibiting S.H.M. must possess
Q.49
Which one of the following is a non-dimensional quantity?
Q.50
The dimension of Planck constant equals to that of
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