set 11 MCQ Questions & Answers Detailed Explanation

MOST IMPORTANT general science mcq - 16 EXERCISES

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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):
In the visible spectrum of light, red light is more energetic than green light.
Reason (R):
The wavelength of red light is more than that of green light.
Code

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

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

(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

The sound from an open pipe is more pleasant than the sound from a closed pipe. This is because :

a) there are more overtone combinations in an open pipe than in a closed one

b) sound is heard from both the sides of an open pipe

c) it is very easy to operate an open pipe

d) the length of the open pipe is shorter

Answer: (a)

Question : 2

‘Pitch’ is a characteristic of sound that depends upon its

a) fequency

b) intensity

c) quality

d) None of these

Answer: (a)

Question : 3

A ray of light travels from medium I to medium II. The figure given shows the variation of sin of angles of incidence (sin i) in medium I with sin of angle of refraction (sin r) in medium II.

physics-optics-mcq-test-series
Consider the following statements
  1. Speed of light in medium I > Speed of light in medium II.
  2. Speed of light in medium I < Speed of light in medium II.
  3. Light travels from denser medium to rarer medium.
Which of the statements given above is/are correct?

a) 1 and 3

b) 1 only

c) 2 only

d) 2 and 3

Answer: (d)

Speed of light is more in rarer medium as compared to denser medium.

Question : 4

The gas used in discharge tubes for optical decoration and advertising is

a) Sulphur dioxide

b) Ammonia

c) Carbon dioxide

d) Neon

Answer: (d)

Question : 5

For shaving, one uses

a) Convex mirror

b) Plain mirror

c) Concave mirror

d) None of the above

Answer: (c)

Question : 6

The change of focal length of an eye lense is caused by action of the

a) Ciliary muscles

b) Retina

c) Pupil

d) Iris

Answer: (d)

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