Physics General Knowledge Quiz
Q. The best colours for a Sun umbrella will be -
1 white on top and black on inside
2 red on top and black on inside
3 black on top and white on inside
4 black on top and red on inside
Ans: 1
Q. Before X-ray examination (coloured X-ray) of the stomach, patients are given suitable salt of barium because -
1 barium is a good absorber of X-rays and helps stomach to appear clearly
2 barium salts are white in colour and this helps stomach to appear clearly
3 barium allows X-rays to pass through the stomach
4 barium salts are easily available
Ans: 1
Q. In SONAR, we use -
1 radio waves
2 audible sound waves
3 infrasonic waves
4 ultrasonic waves
Ans: 4
Q. A liquid is kept in a regular cylindrical vessel up to a certain height. If this vessel is replaced by another cylindrical vessel having half the area of cross-section of the bottom, the pressure on the bottom will -
1 be increased to twice the earlier pressure
2 be reduced to one-fourth the earlier pressure
3 remain unaffected
4 be reduced to half the earlier pressure
Ans: 1
Q. The time period of a simple pendulum having a spherical wooden bob is 2 second. If the bob is replaced by a metallic one twice as heavy, the time period will be -
1 more than 2 second
2 1 second
3 2 second
4 less than 1 second
Ans: 3
Q. Which one among the following statements about an atom is not correct?
1 Atoms are the basic units from which molecules and ions are formed
2 Atoms always combine to form molecules
3 Atoms aggregate in large numbers to form the matter that we can see, feel and touch
4 Atoms are always neutral in nature
Ans: 3
Q. The working principle of a washing machine is -
1 Dialysis
2 Centrifugation
3 Reverse osmosis
4 Diffusion
Ans: 2
Q. A spherical ball made of steel when dropped in mercury container will
1 sink in mercury
2 will be on the surface of mercury
3 will be partly immersed in mercury
4 will dissolve in mercury
Ans: 3
Q. The sounds having a frequency of 20 Hertz to 20,000 Hertz are known as
1 Ultrasonics
2 Audible sounds
3 Infrasonics
4 Megasonics
Ans: 2
Q. Pure water is bad conductor of electricity because it is
1 not volatile
2 feebly ionized
3 a non-polar solvent
4 a very good solvent
Ans: 2
[DOUBLEPOST=1357439786][/DOUBLEPOST]Q. The metals commonly used for electroplating are
1 Gold, Sodium & Chromium
2 Chromium, Copper & Nickel
3 Nickel, Lead & Chromium
4 Gold, Sodium & Potassium
Ans: 2
Q. Gamma rays have greatest similarity with
1 a-rays
2 b-rays
3 X-rays
4 U.V.rays
Ans: 3
Q. Two 220 V, 60 W bulbs are used for 5 hours a day for 10 days. If each unit (1 kilowatt hour) costs Rs. 3.50, find the total expense for it -
1 Rs. 10.50
2 Rs. 38.50
3 Rs. 77.00
4 Rs. 21.00
Ans: 4
Q. There are four statements gives below explaining why mercury is chosen as a thermometric liquid. which of these statements is wrong?
1 Volume of mercury increases equally for equal rises of temperature
2 Mercury is a good conductor of heat
3 Mercury does not stick to glass
4 Mercury has a large specific heat
Ans: 1
Q. The internal energy of a body means -
1 Sum total of its kinetic and potential energy of its constituent molecules.
2 its kinetic energy
3 Total kinetic energy of its constituent moleules
4 Sum total of its kinetic and potential energy
Ans: 1
Q. Which of the following is a dimensionless quantity?
1 Acceleration
2 Volume
3 Refractive Index
4 Kinetic energy
Ans: 3
Q. Four wires of same material and different dimensions are stretched under the equal weight, which one will suffer greater elongation? The dimensions are given below -
1 Length 100 cm, diameter 1 mm
2 Length 200 cm, diameter 2 mm
3 Length 300 cm, diameter 3 mm
4 Length 400 cm, diameter 0.5 mm
Ans: 4
Q. Water is used in hot water bags because
1 it is easily obtained
2 it has high specific heat
3 it is cheaper and is not harmful
4 it is easy to heat water
Ans: 2
Q. Water drops cannot stick to the oily surface due to
1 surface tension
2 lack of adhesive force
3 water is lighter than oil
4 cannot mix each other
Ans: 2
Q. Energy in reflected light
1 does not depends on the angle of incidence
2 decreases with the increase in angle of incidence
3 increases with the increase in angle of incidence
4 becomes maximum for angle of incidence equal to 45 degree
Ans:
1
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