Q.1
Which of the following is used for regulated electric supply ?
Q.2
In electronics what comes under tank circuit ?
Q.3
A soap bubble shows colours when illuminated with white light. This is due to
Q.4
Universal gates are
Q.5
Which one among the following components is used as an amplifying device?
Q.6
An integrated circuit is more advantages than a coventional circuit because
Q.7
A NOT gate can be implemented by:
Q.8
Which of the following waves cannot be polarised?
Q.9
Which of the following features of a tunnel diode is its drawback?
Q.10
The plastic material commonly used for making gear wheels is
Q.11
A fresh egg when placed in salt water will
Q.12
Burns caused by steam are much severe than those caused by boiling water because
Q.13
Which of the following has got more heat capacity ?
Q.14
What is the reason for twinkling of stars ?
Q.15
The bats can fly in the dark because
Q.16
Which of the following produces more severe burns ?
Q.17
Which elements are malleable and good conductors of electricity?
Q.18
The basic reason for the extraordinary sparkle of suitably cut diamond is that
Q.19
The device used for locating submerged objects under sea is.
Q.20
Heat stored in water vapour is
Q.21
Which of the following colour of light deviates least through the prism?
Q.22
When a body falls from an aeroplane, there is increase in its
Q.23
Water cannot be used to extinguish fire caused by electric current, because
Q.24
Find the resistance (in mega) of a wire of length 20m, cross sectional area 1 cm2 and made of a material of resistivity 200m.
Q.25
The sounds having a frequency of 20 Hertz to 20,000 Hertz are known as
Q.26
In mirrors the back surface is coated with a thin layer of :
Q.27
The energy emitted by the Sun is due to
Q.28
Which of these is not a simple machine?
Q.29
Optical fibre works on which of the following principle of light?
Q.30
If electric resistance is to be decreased, then the number of resistances should be connected in ________
Q.31
Ampere second could be the unit of
Q.32
Bending of light rays in denser medium is termed as:
Q.33
Which of the following never occurs singly in nature?
Q.34
The moment of inertia of a body does not depend upon
Q.35
Brightness of bulb depends on voltage or current?
Q.36
A copper wire of radius r and length l has a resistance of R. A second copper wire with radius 2r and length l is taken and the two wires are joined in a parallel combination. The resultant resistance of the parallel combination of the two wires will be
Q.37
A light ray travelling from denser to rarer medium at an angle of incidence more than critical angle of concerned media pair suffers.
Q.38
Where does hydroelectric energy come from?
Q.39
Which colour has the highest energy?
Q.40
Which colour of light shows maximum deviation when passed through a prism ?
Q.41
Which one of the following is a good electrical conductor?
Q.42
Which of the following is not a form of Energy?
Q.43
Newton's first law of motion gives the concept of
Q.44
The resistance of a conductor is inversely proportional to its:
Q.45
Which one of the following is an ohmic conductor?
Q.46
Which of the following is a good conductor of heat but a bad conductor of electricity ?
Q.47
Red is used as an emergency or danger signal as
Q.48
The source of the Sun's energy is the process of
Q.49
The reason for a swimming pool to appear less deep than the actual depth is
Q.50
The sparkling of a diamond is due to
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