Selina Concise Physics Class 8. We covered all the Selina Concise Physics Class 8 MCQs in this post for free so that you can practice well for the exam.
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Selina Concise Physics Class 8 Objective for Students
When the short circuit condition occurs, the current in the circuit:
(a) Becomes zero
(b) Remains constant
(c) Increases substantially
(d) Keeps on changing randomly
Option c – Increases substantially
If the linear momentum of a moving object gets doubled due to the application of a force, then its kinetic energy will:
(a) Remain the same
(b) Increase by four times
(c) Increase by two times
(d) Increase by eight times
Option b – Increase by four times
If the distance between two objects is increased by two times, the gravitational force between them will:
(a) Remain the same
(b) Increase by two times
(c) Decrease by two times
(d) Decrease by four times
Option d – Decrease by four times
Which one of the following statements with regard to ultraviolet light is not correct?
(a) It is an electromagnetic wave.
(b) It can travel through a vacuum.
(c) It is a longitudinal wave.
(d) Its wavelength is shorter/smaller than that of visible light.
Option c – It is a longitudinal wave
A luminous object is placed at a distance of 40 cm from a converging lens of focal length 25 cm. The image obtained on the screen is:
(a) Erect and magnified
(b) Erect and smaller
(c) Inverted and magnified
(d) Inverted and smaller
Option c – Inverted and magnified
When a light ray enters into a glass medium from water at an angle of incidence 0°, what would be the angle of refraction?
(a) 90°
(b) 45°
(c) 0°
(d) The ray will not enter at all
Option c – 0°
Which one of the following phenomena verifies the fact that light travels much faster than sound?
(a) Twinkling of stars in the night sky
(b) Lighting of a matchstick
(c) Thunderstorm
(d) Mirage
Option c – Thunderstorm
Which one of the following statements about sound is not correct?
(a) Sound travels at a speed slower than the speed of light
(b) Sound waves are transverse waves
(c) Sound waves are longitudinal waves
(d) Sound travels faster in moist air than in dry air
Option b – Sound waves are transverse waves
We covered all the Selina concise physics class 8 mcqs above in this post for free so that you can practice well for the exam.
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