set 6 MCQ Questions & Answers Detailed Explanation

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The following question based on light, heat, thermodynamics, wave motion, sound, optics & oscillations topic of general science mcq

Questions : Assertion (A):
Radio waves bend in a magnetic field.
Reason (R):
Radio waves are electromagnetic in nature.
Code

(a) Both (A) and (R) are true, but (R) is not the correct explanation of (A)

(b) (A) is true, but (R) is false

(c) Both (A) and (R) are true and (R) is the correct explanation of (A)

(d) (A) is false, but (R) is true

The correct answers to the above question in:

Answer: (d)

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Read more light heat thermodynamics wave sound optics oscillation Based General Science Questions and Answers

Question : 1

What temperature is the same on celsius scale as well as on Fahrenheit scale?

a) – 32°C

b) – 212°C

c) – 40°C

d) 32°C

Answer: (c)

$C/5 = {F - 32}/9$ Here C = F

$C/5 = {F - 32}/9$ ⇒ 9C = 5C – 160

4C = – 160 ⇒ C = – 40°C.

Thus at –40°C and –40° F the temperture is same.

Question : 2

Cooling is done by

a) Release of compressed gas

b) Cooking gas

c) Flow of water

d) Melting the solid

Answer: (a)

Question : 3

The image formed on Retina is

a) Smaller than object but inverted

b) Smaller than object but straight

c) Equal to object but inverted

d) Equal to object but straight

Answer: (a)

Question : 4

Which one of the following statement is not correct?

a) In summer, white or light coloured clothes are preferred to dark coloured clothes generally

b) Concave mirrors are used in searchlights

c) Mirage is an optical illusion arising due to total internal reflection of light

d) Convex mirror with a small aperture is used by doctors to examine, ear, nose or throat of a patient

Answer: (d)

Question : 5

Gases exert pressure on the walls of the container because the gas molecules

a) have finite volume

b) possess momentum

c) collide with each other

d) obey gas laws

Answer: (b)

Question : 6

FM broadcasting service uses the range of frequency bands between

a) 76-87 MHz

b) 54-75 MHz

c) 109-139 MHz

d) 88-108 MHz

Answer: (d)

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