Question 1.
What is refractive index ?
A. It is defined as the ratio of speed of light in the medium to the speed of light in vacuum.
B. It is defined as the product of speed of light in medium and in vacuum.
C. It is defined as the ratio of speed of light in vacuum to the speed of light in the medium.
D. None of above
Ans: C. It is defined as the ratio of speed of light in vacuum to the speed of light in the medium.
Question 2.
A concave lens always forms an image which is
A. Real and erect
B. Virtual and erect
C. Real and inverted
D. Virtual and inverted
Ans: B. Virtual and erect
Question 3.
Which alternative energy source is exhaustible?
A. Tidal energy
B. Wind energy
C. Solar energy
D. Geothermal energy
Ans: D. Geothermal energy
Question 4.
Solar cells work on the principle of
A. Photovoltaic effect
B.Photoelectric effect
C. Photoconductive effect
D. Photosynthesis
Ans: A. Photovoltaic effect
Question 5.
A star appears twinkling in the sky because of
A. Scattering of light by atmosphere
B. Reflection of light by atmosphere
C. Refraction of light by atmosphere
D. Diffraction of light by atmosphere
Ans: C. Refraction of light by atmosphere
Question 6.
Which one of the following determines the sharpness of image in a camera ?
A. The aperture
B. The exposure time
C. The focal length of the lens
D. Size of the camera
Ans: A. The aperture
Question 7.
Which of the following is a Non Renewable Resource of Energy?
A. Wind Power
B. Hydrogen Fuel
C. Natural Gas
D. Solar Energy
Ans: C. Natural Gas
Question 8.
Wind and solar energy are examples of
A. Non renewable
B. Renewable
C. Unsustainable
D. Limited
Ans: B. Renewable
Question 9.
What type of lens is used in a magnifying glass
A. Concave
B. Plano-concave
C. Convex
D. None of the above
Ans: C. Convex
Question 10.
Dioptre is the unit of
A. Power of a lens
B. Focal length of a lens
C. Light intensity
D. Sound intensity
Ans: A. Power of a lens
Question 11.
Which of the following is a renewable resource of energy?
A. Hydrogen fuel
B. Wind energy
C. Solar energy
D. All of the above
Ans: D. All of the above
Question 12.
Electrostatic precipitator is used to control the pollution of
A. Air
B. Water
C. Noise
D. Thermal
Ans: A. Air
Question 13
Time of exposure required for taking photograph of an object depends upon the
A. Brightness of the object
B. Skill of photographer
C. Proximity of object
D. Size of the object
Ans: A. Brightness of the object
Question 14.
The part of the eye having the largest refractive index is :
A. Cornea
B. Aqueous humor
C. Lens
D. Vitreous humor
Ans: C. Lens
Question 15.
The group of solar cells joined together in a definite pattern is called a
A. Battery
B. Solar heater
C. Solar cooker
D. Solar cell panel
Ans: D. Solar cell panel
Question 16.
Hydro-electric power is a:
A. non-renewable natural resource
B. A mixture of renewable and non-renewable natural resource
C. Neither renewable nor non renewable resource
D. Renewable natural resource
Ans: D. Renewable natural resource
Question 17.
A concave lens always forms
A. A real image
B. A virtual image
C. An image type which depends on object characteristics
D. An image type which depends on lens curvature
Ans: B. A virtual image
Question 18.
Vehicles use __ to see the objects coming from behind.
A. Concave lens
B. Convex lens
C. Convex mirror
D. Concave mirror
Ans: B. Convex lens
Question 19.
Which of the following uses a Non Renewable Energy Source?
A. Wind Mill Power Plant
B. Hydro Electric Plant
C. Nuclear Power Plant
D. Tidal Power Plant
Ans: C. Nuclear Power Plant
Question 20.
Energy that is produced commercially from coal is called
A. Light energy
B. Kinetic energy
C. Thermal energy
D. Potential energy
Ans: C. Thermal energy
Physics GK MCQs all set
- Physics MCQs Set-1
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