Physics MCQ Questions with Answer | ||||
| Quiz-1 | Quiz-2 | Quiz-3 | Quiz-4 | Quiz-5 |
| Quiz-6 | Quiz-7 | Quiz-8 | Quiz-9 | Quiz-10 |
| Quiz-11 | Quiz-12 | Quiz-13 | Quiz-14 | Quiz-15 |
Q51. Which of the following force is a virtual force?
(a) Centripetal force
(b) Centripetal Reaction force
(c) Centrifugal force
(d) Strong Nuclear force
Q52. The weight of a body acts through the centre of
(a) Gravity
(b) Mass
(c) Both (1) and (2)
(d) Buoyancy
Q53. The instrument used to change the speed of the electric fan –
(a) Amplifier
(b) Regulator
(c) Switch
(d) Rectifier
Q54. Assertion (A): In a motion picture, usually 24 frames are projected every second over the whole length of the film.
Reason (R): An image formed on the retina of the eye persists for about 0.1 s after the removal of the stimulus.
Cade:
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is not a correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
Q55. Optical fibre works on the principle of
(a) Total internal reflection
(b) Refraction
(c) Scattering
(d) Interference
Q56. The filament of an electric bulb is made up of–
(a) Copper
(b) Nichrome
(c) Lead
(d) Tungsten
Q57. Assertion (A): Small glass beads toed on traffic signals glow brightly when light falls upon them.
Reason (R): Light is totally reflected when the angle of incidence exceeds a certain critical value and light travelling in a denser medium is reflected from a rarer medium.
Codes: (a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is not a correct explanation of A
(c) A Ls true but R is false
(d) A is false but R is true
Q58. The least distance of distinct vision for the human eye is
(a) 25 cm
(b) 5 cm
(c) 75 cm
(d) 100 cm
Q59. Consider the following statement: The principle of total internal reflection is applicable to explain the
1. Formation of mirage in the desert.
2. Formation of the image in the microscope.
3. Colour of the evening sky.
4. Operation of optical fibres.
Which of the statement given above are correct?
(a) 1 and 4
(b) 3 and 4
(c) 2 and 3
(d) 1 and 2
Q60. ‘Therm’ is the unit of
(a) Power
(b) Heat
(c) Light
(d) Distance
Q61. How much mechanical work must be done to completely melt 1 gram of ice at 0°C?
(a) 4.2 J
(b) 80 J
(c) 336 J
(d) 2268 J
Q62. Which once, the following is printed on a commonly used fluorescent tube light?
(a) 220K
(b) 273K
(c) 6500 K
(d) 9000 K
Q63. Consider the following statements:
In a nuclear reactor, a self-sustained chain reaction is possible, because:
- More muttons are released in each of the fission reactions.
- The neutrons immediately take part in the fission process.
- The fast neutrons are slowed down by graphite.
- Every neutron released in the fission reaction initiates further fission.
Which of these statements are correct?
(a) 1, 2 and 3
(b) 1 and 3
(c) 2 and 4
(d) 2, 3 and 4.
Q64. Equation E = p.c. is valid for –
(a) Both electron and Photon
(b) Electron only
(c) Photon only
(d) Neither electron nor photon
Q65. A brass ball is tied to a thin wire and swung so as to move uniformly in a horizontal circle. Which of the following statements in this regard is/are true?
1. The ball moves with constant velocity
2. The ball moves with constant speed
3. The ball moves with constant acceleration
4. The magnitude of the acceleration of the ball is constant
Select the correct answer using the code given below:
(a) 1 only
(b) 1 and 3
(c) 1, 2 and 4
(d) 2 and 4 only
Q66. The final image is a simple microscope that is
(a) Real, diminished, and inverted
(b) Real, magnified, and erect
(c) Virtual, magnified, and erect
(d) Virtual, diminished and erect
Q67. The boiling point of a liquid varies as
(a) Pressure varies
(b) Temperature varies
(c) Volume varies
(d) Density varies
Q68. Consider the following statements:
- A geostationary satellite is at an approximate height of 10.000 km.
- FM transmission of music is of very good quality because the atmospheric or man-made noises which are generally frequency variations can do little harm.
Which of the statements given above is correct?
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
Q69. Match List-I with List-II and select the correct answer with the help of codes given below:
| List-I | List-II |
| A. Temperature | 1. Kelvin |
| B. Power | 2. Watt |
| C. Pressure | 3. Pascal |
| D. Force | 4. Newton |
Codes: A B C D
(a) 2 1 3 4
(b) 1 2 4 3
(c) 1 2 3 4
(d) 2 1 4 3
Q70. A myopic eye can be corrected by using a
(a) Convex lens
(b) Concave lens
(c) Cylindrical lens
(d) Plano-convex lens
Q71. When the length of the tube of a microscope is increased, its magnifying power –
(a) Decreases
(b) Increases
(c) Remains constant
(d) None of the above
Q72. A light-year is a unit of
(a) Time
(b) Distance
(c) Speed of light
(d) Intensity of light
Q73. With reference to ‘fuel cells’ in which hydrogen-rich fuel and oxygen are used to generate electricity. Consider the following statements:
- If pure hydrogen is used as a fuel, the fuel cell emits heat and water as by-products.
- Fuel eels can be used for powering buildings and not for small devices like laptop computers.
- Fuel cells produce electricity in the form of Alternating Current (AC).
Which of the statements given above is/are correct?
(a) 1 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
Q74. The objective in a reflecting telescope is –
(a) Concave mirror
(b) Convex mirror
(c) Prism
(d) Concavo – Convex lens
Q75. The tail of a comet is directed away from the sun because:
(a) As the comet rotates around the sun, the lighter mass of the comet is pushed away due to the centrifugal force alone
(b) As the comet rotates, the lighter mass of the comet is attracted by some stars situated in the direction of its tail
(c) The radiation emitted by the sun exerts a radial pressure on the comet throwing its tail away from the sun
(d) The tail of the comet always exists in the same orientation