Question 1.
What is the range of Strong Nuclear force?
A. Infinite
B. Very short Subnuclear size
C. Very short Nuclear size
D. None
Ans: C. Very short Nuclear size
Question 2.
Which one of the following wavelengths of light is most effective in photosynthesis ?
A. Blue
B. Green
C. Orange
D. Yellow
Ans: A. Blue
Question 3.
Find the power of a convex lens if the image formed is at a distance of 25 cm from the lens when the object is placed on the other side of the lens at 12 cm from the optical centre?
A. -4.33 diopters
B. 12.33 diopters
C. -12.33 diopters
D. 4.33 diopters
Ans: B. 12.33 diopters
Question 4.
Which of the following characteristics of light remains unchanged when light travels from vaccum enters water?
A. Speed
B. Amplitude
C. Frequency
D. Wavelength
Ans: C. Frequency
Question 5.
Name the process of production of energy in the Sun
A. Nuclear fission
B. Radioactivity
C. Nuclear fusion
D. Ionization
Ans: C. Nuclear fusion
Question 6.
The optical phenomenon that is primarily responsible for the observation of rainbow on a rainy day is
A. Diffraction
B. Interference
C. Dispersion
D. Reflection
Ans: C. Dispersion
Question 7.
Find the power of a convex lens if the image formed is at a distance of 16 cm from the lens when the object is placed on the other side of the lens at 20 cm from the optical centre?
A. -3.75 diopters
B. -11.25 diopters
C. 3.75 diopters
D. 11.25 diopters
Ans: D. 11.25 diopters
Question 8.
To resolve an object in an electron microscope,
A. The wavelength of the electrons must be close to the diameter of the object
B. The wavelength of the electrons must be greater than the diameter of the object.
C. Both A & B
D. None of the above
Ans: A. The wavelength of the electrons must be close to the diameter of the object
Question 9.
Which type of reaction produces the most harmful radiation ?
A. Fusion reaction
B. Fission reaction
C. Chemical reaction
D. Photo-Chemical reaction
Ans: B. Fission reaction
Question 10.
An electron microscope gives higher magnification than an optical microscope, because :
A. It uses more powerful lenses
B. The velocity of electron is smaller than that of visible light
C. The electrons have more energy than the light particles
D. The wavelength of electrons is smaller as compared to the wavelength of visible light
Ans: D. The wavelength of electrons is smaller as compared to the wavelength of visible light
Question 11.
A colour-blind person cannot
A. See distant objects
B. See black colour
C. Distinguish between certain colours
D. Have persistence of vision
Ans: C. Distinguish between certain colours
Question 12.
Which of the following is an example of continous emission spectrum?
A. Spectrum of an oil frame
B. Spectrum of a water
C. Both
D. None
Ans: A. Spectrum of an oil frame
Question 13.
Energy is continuously created in the sun due to:
A. Nuclear fusion
B. Nuclear fission
C. Radioactivity
D. Artificial radioactivity
Ans: A. Nuclear fusion
Question 14.
The magnifying power of an astronomical telescope can be decreased by
A. Decreasing the focal length of the eyepiece
B. Increasing the focal length of the eyepiece
C. Increasing the focal length of the objective
D. None of these
Ans: B. Increasing the focal length of the eyepiece
Question 15.
Magnifying Glass is basically a
A. Plano-concave lens
B. Concave lens
C. Convex lens
D. Cylindrical lens
Ans: C. Convex lens
Question 16.
The atmospheric layer reflecting radio waves is called
A. Ozonosphere
B. Ionosphere
C. Stratosphere
D. Mesosphere
Ans: B. Ionosphere
Question 17.
The mass defect is the result of what action occurring?
A. Mass being converted to energy when protons and neutrons bind together in a nucleus
B. Protons and electrons being attracted to each other
C. Energy being converted into moles of atoms when neutrons break apart protons
D. Mass being converted to energy when protons and neutrons break apart in a nucleus
Ans: A. Mass being converted to energy when protons and neutrons bind together in a nucleus
Question 18.
The light rays used for eliminating bacteria is
A. X-rays
B. Infrared rays
C. Microwave radiation
D. Ultra-violet radiation
Ans: D. Ultra-violet radiation
Question 19.
A microscope used in pathological laboratories forms
A. Magnified, virtual, erect image
B. Diminished, real and erect image
C. Magnified, virtual and inverted image
D. Diminished, virtual and erect image
Ans: C. Magnified, virtual and inverted image
Question 20.
For a ray of light to suffer total internal reflection it has to pass from :
A. Glass to water
B. Water to glass
C. Air to water
D. Air to glass
Ans: C. Air to water
Physics GK MCQs all set
- Physics MCQs Set-1
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