Q.1
Pipelines in cold countries often burst in winter, because
Q.2
A mirage occurs because of
Q.3
Optical fibres are based on the phenomenon of
Q.4
Convex mirror is generally used in ________
Q.5
In which one of the following the phenomenon of total internal reflection of light is used ?
Q.6
The reflector of a search light is a :
Q.7
In severe winter, in cold countries water pipes burst because
Q.8
The angle between the ________ and the incident ray is called the angle of incidence.
Q.9
Which type of mirror is used in the head lights of vehicles ?
Q.10
If objects appear enlarged and inverted in a rear view mirror, then which type of mirror is used?
Q.11
Optical Fibre technology works on which of these principles of Physics?
Q.12
What is the reason for formation of Mirage in desert?
Q.13
Railway tracks are banked on curves so that
Q.14
The density of the liquid when heated
Q.15
A periscope works by the principle of
Q.16
A periscope works on the principle of
Q.17
Stars appears to move from east to west because
Q.18
Pa(Pascal) is the unit for
Q.19
Large transformers, when used for some time, become very hot and are cooled by circulating oil. The heating of the transformer is due to:
Q.20
Nuclear sizes are expressed in a unit named
Q.21
Planets do not twinkle because
Q.22
Metals are good conductors of electricity because:
Q.23
Light year is a unit of
Q.24
Mirage is due to:
Q.25
Which of the following terms is not used in the field of physics?
Q.26
Rainbow is produced when sunlight fall on drops of rain. Which of the following physical phenomena are responsible for this?

  1. I.Diffusion
  2. II.Refraction
  3. III.Internal reflection
Q.27
A wheel-barrow is an example of
Q.28
Let a thin capillary tube be replaced with another tube of insufficient length then, we find water
Q.29
Which of the following is not a part of a CRT ?
Q.30
Slip rings are usually made of
Q.31
The size of gear is usually specified by
Q.32
Which of the following is a compound machine?
Q.33
Light from the Sun reaches us in nearly
Q.34
Radiocarbon is produced in the atmosphere as a result of
Q.35
It is easier to roll a stone up a sloping road than to lift it vertical upwards because
Q.36
Natural radioactivity was discovered by
Q.37
Planets are
Q.38
One nanometer is equal to
Q.39
A single fixed pulley is used to draw water from a well because
Q.40
A fixture is defined as a device which
Q.41
What type of simple machine is an axe?
Q.42
The safest hammers are those with heads that are
Q.43
The function of ball bearings in a wheel is :
Q.44
Gear finishing operation is called
Q.45
Which of the following is an example for cantilever beam?
Q.46
A machine powered by rotating blades is a
Q.47
The absorption of ink by blotting paper involves:
Q.48
Siphon will fail to work if:
Q.49
If a copper wire is increased to double its length, its resistance will become
Q.50
The filament of electric bulb is made up of :
0 h : 0 m : 1 s