Practice Physics questions - general science mcq Online Quiz (set-1) For All Competitive Exams
Q-1) If the lens power of glass is +2 dioptre, its focal length will be
(a)
(b)
(c)
(d)
Q-2) The optimum sound level for human beings is
(a)
(b)
(c)
(d)
Q-3) Sound waves travel fastest in
(a)
(b)
(c)
(d)
Q-4) Consider the following statements.
- A flute of smaller length produces waves of lower frequency.
- Sound travels in rocks in the form of longitudinal elastic waves only.
Which of the statements given above is/are correct?
(a)
(b)
(c)
(d)
Q-5) Consider the following natural phenomena:
- Terrestrial heating
- Reflection of light
- Refraction of light
- Diffraction of light
Due to which of these phenomena is a mirage formed ?
(a)
(b)
(c)
(d)
Convection currents of hot air rising off a surface have a lower density than the air directly above it.
The difference in density cause light passing through the air to refract differently, which causes the formation of mirage.
Q-6) Which one among the following has the highest energy?
(a)
(b)
(c)
(d)
Q-7) Heat is transmitted from higher to lower temperature through actual mass motion of the molecules in
(a)
(b)
(c)
(d)
Q-8) When light passes from one medium to another medium, which one of the following does not change?
(a)
(b)
(c)
(d)
Q-9) Which of the following is used to take 3-dimensional pictures?
(a)
(b)
(c)
(d)
Q-10) If Va, Vw and Vs respectively are the speed of sound in air, water and steel, then
(a)
(b)
(c)
(d)