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1000+ General Physics MCQ for SSC CHSL [Solved]

Thursday 9th of March 2023

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1. Diamond shines because of its
A. purity
B. hardness
C. high density
D. high refractive index and low critical angle
Answer : D
2. In experiments on static electricity the standard method for obtaining small amounts of positive electricity is to rub
A. a glass rod with flannel
B. an abonite rod with flannel
C. a glass rod with silk
D. Any of the above
Answer : C
3. The speed of sound in air at 0° C is approximately
A. 4 x 10 8 m/s
B. 1500 m/s
C. 330 m/s
D. 500 m/s
Answer : C
4. The image of an object formed in a plane mirror
A. is real
B. is virtual
C. can be obtained on a screen
D. is slightly bigger than the object
Answer : B
5. No current will flow between two charged bodies if they have the same
A. resistance
B. charge
C. potential
D. charge/potential ratio
Answer : C
6. A sensitive instrument susceptible to magnetic infiuence can be protected from external magnetic field by
A. enclosing it in a thick walled iron box
B. wrapping it with an insulator
C. by placing it inside a glass case
D. by surrounding it with fine copper gauze
Answer : A
7. On applying a constant force to a mass, It moves with a uniform
A. velocity
B. momentum
C. acceleration
D. angular velocity
Answer : C
8. X-rays were discovered by
A. Wilhelm Roentgen
B. WO Coolidge
C. Henry Cavendish
D. William Watson
Answer : A
9. Which physical quantity is measured in watts
A. power
B. kinetic energy
C. momentum
D. impulse
Answer : A
10. The rocket engine is motivated by jet propulsion which uses the famous
A. Kepler's Laws
B. Newtonian Third Law of Motion
C. Bernoulli's Principle
D. Law of Relativity
Answer : B
11. Acoustics' la a branch or study dealing with
A. historical sites
B. architecture
C. sound
D. trigonometry
Answer : C
12. The plants in a greenhouse are enclosed in a glass enclosure because
A. glass allows the heat radiations of shorter wavelengths from the sun to pass through
B. the plants absorb them - these shorter wavelengths - and reradiate them in the form of longer wavelengths
C. the longer wavelengths cannot penetrate through the glass walls
D. All the above
Answer : D
13. Antiparticle of electron is
A. proton
B. antiproton
C. positron
D. neutron
Answer : C
14. At temperature near OK, (zero kelvin) metals such as lead and tin become
A. insulators
B. semiconductors
C. superconductors
D. condenser
Answer : C
15. The frequency of an ultrasonic wave is
A. the same as that of an audible sound
B. above the audible range
C. below the audible range
D. None of the above
Answer : B
16. The asteroids belt lies between the orbits of
A. Earth and Mars
B. Venus and Earth
C. Mars and Jupiter
D. Moon and Mars
Answer : C
17. The speed of light is minimum while passing through
A. air
B. glass
C. vacuum
D. water
Answer : B
18. A device used to measure heights above sea level is known as
A. altimeter
B. anemometer
C. dilatometer
D. potentiometer
Answer : A
19. The force that keeps a body in a circular motion is called
A. the centripetal force
B. the centrifugal force
C. the frictional force
D. All the above
Answer : A
20. Halley's comet appears in the heavens once in
A. 40 years
B. 50 years
C. 76 years
D. 80 years
Answer : C
21. Why is nuclear fusion also known as thermonuclear reaction?
A. Fusion converts nuclear energy into heat
B. Fusion demands conditions of extremely high temperature to produce it
C. Fusion produces large amount of heat
D. Fusion reactions takes place in the sun
Answer : B
22. Which of the following wires of same dimensions offers least resistance to the ,flow of current?
A. copper
B. aluminium
C. silver
D. nichrome
Answer : C
23. The minimum velocity required by a satellite to escape earth's gravitational pull is
A. 18 km/s
B. 11.2 km /s
C. 21 km/s
D. 35 km/s
Answer : B
24. Water kept in an earthen pot is less cool on rainy days than in summer because during the rainy days
A. the pores in the pot are closed
B. rain water stops oozing out from the pores
C. the water that oozes out does not evaporate quickly because of the large percentage of moisture in the air
D. surface of the pot becomes damp
Answer : C
25. The radiator in a car serves to
A. cool the engine
B. heat up the engine
C. start the car
D. moderate the speed
Answer : A
26. The base of an electric iron is brightly polished mainly
A. to make it smooth and frictionless
B. to make it rust - proof
C. to reduce heat loss by radiation
D. to make it more durable
Answer : C
27. Which of the following pairs is not correct?
A. Television - Baird
B. Transistor ~ Shockley
C. Thermometer - Celsius
D. Barometer Torricelli
Answer : C
28. The loudness of a sound is determined by
A. Frequency
B. Amplitude
C. Speed
D. Wavelength
Answer : B
29. How is it that Pluto is not always the farthest planet of the solar system?
A. Each planet becomes the farthest planet in its turn. Now it is the turn of Piuto
B. The Sun is now in the zodiac in which it is nearest to outer planets
C. The eccentricity of Piuto's orbit being substantial, this orbit cuts the orbit of Neptune
D. Piuto belongs to other solar system
Answer : C
30. Warm air will hold more water vapour than cold air because
A. it is lighter
B. it has more water vapour in it
C. its molecules are close together
D. its molecules are far apart
Answer : D
31. How is it that Pluto is not always the farthest planet of the solar system?
A. Each planet becomes the farthest planet in its turn. Now it is the turn of Piuto
B. The Sun is now in the zodiac in which it is nearest to outer planets
C. The eccentricity of Piuto's orbit being substantial, this orbit cuts the orbit of Neptune
D. Piuto belongs to other solar system
Answer : C
32. The ozone layer absorbs
A. Cosmic rays
B. Infrared rays
C. All radiations of light
D. Ultra violet rays coming from the sun
Answer : D
33. In a river, the currents are fastest where the river la
A. wide and shallow
B. narrow and shallow
C. wide and deep
D. narrow and deep
Answer : B
34. The function of a moderator in a nuclear reactor is
A. to absorb unwanted neutrons
B. to slow down the fast neutrons to secure more effective hits on other nuclei
C. to decrease the number of fissile nuclei
D. to increase the number of fissile nuclei
Answer : B
35. Sound travels fastest in
A. air
B. water
C. iron
D. vacuum
Answer : C
36. Tea pots are highly polished
A. so that they may reflect thermal radiation from outside and minimise such radiation from them
B. so that they may absorb all radiation from outside
C. to make them attractive to look at
D. because they take high polish
Answer : A
37. Tea pots are highly polished
A. so that they may reflect thermal radiation from outside and minimise such radiation from them
B. so that they may absorb all radiation from outside
C. to make them attractive to look at
D. because they take high polish
Answer : A
38. A man stands in a lift which accelerates upwards. The resultant reaction force on the floor of the lift is
A. greater than the weight of the man
B. less than the weight of the man
C. same as the weight of the man
D. zero
Answer : A
39. The attraction between similar molecules is called
A. inertia
B. adhesion
C. cohesion
D. friction
Answer : C
40. A boat loaded with rocks floats in the middle of a swimming pool. A man in the boat throws the rocks overboard. The level of water in the pool will
A. increase
B. decrease
C. remain the same
D. first decrease and then increase
Answer : B
41. In the nucleus of an atom, the uncharged particle is
A. proton
B. neutron
C. electron
D. positron
Answer : B
42. The stem of a vibrating tuning fork is pressed against a sound box. Then
A. the loudness of the sound increases
B. the loudness remains the same
C. the loudness decreases
D. the sound suddenly stops
Answer : A
43. The mass number and the atomic number of an element are X and Y respectively. The number oC neutrons in the atom of that element is
A. X
B. Y
C. X + Y
D. X Y
Answer : D
44. Formation of shadows can be explained by
A. rectilinear propagation of light
B. reflection
C. refraction
D. total internal reflection
Answer : A
45. The Indian Satellite System used for domestic communications, television and meteorology is known as
A. INSAT
B. Bhaskara
C. Aryabhatta
D All the above
Answer : A
46. We see the sun before it actually rises on the horizon. This is due to
A. refraction
B. reflection
C. total internal reflection
D. parallax
Answer : A
47. To concentrate light on the defective teeth, the dentists use
A. convex mirrors
B. concave mirrors
C. convex lens
D. concave lens
Answer : B
48. Out of the following which element has the longest half-life period?
A. Radium
B. Radon
C. Uranium-238
D. Plutonium
Answer : C
49. Separating particles from a suspension is effected by
A. centrifugal force
B. frictional force
C. gravitational force
D. distillation
Answer : A
50. The difference between planets and stars is
A. planets do not have light of their own whereas stars shine by their own light
B. planets do not twinkle like stars
C. planets are much smaller than stars
D. All the above
Answer : D

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