set 16 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 : Maximum temperature inside pressure cooker depends on

(a) Area of hole on the top and food being cooked

(b) Weight kept on hole at top and food being cooked

(c) Area of hole on the top and weight kept on it

(d) Area of hole on the top only

The correct answers to the above question in:

Answer: (c)

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

Question : 1

The reflection of sound is called echo. Which of the following conditions is/ are necessary for the formation of echo?

  1. The minimum distance between the source of sound and the reflecting body should be 17 m.
  2. The wavelength of sound should be less than the height of the reflecting body.

a) 1 and 2 both

b) 1 only

c) 2 only

d) None

Answer: (a)

The minimum distance between source and reflector of sound is given by,

ddim= $vt/2$

Question : 2

In driving a car which type of mirror would you like to use for observing traffic at your back?

a) Convex mirror

b) Spherical mirror

c) Concave mirror

d) Plain mirror

Answer: (a)

Question : 3

Opening the door of refrigerator kept in the room

a) You can cool the room to the temperature of refrigerator

b) You are warm the room a little

c) You can cool the room to some degree

d) You can neither cool nor warm the room

Answer: (b)

Question : 4

The least distance (in cm) of distinct vision in

a) 75

b) 5

c) 25

d) 100

Answer: (c)

Question : 5

Rear-view mirror used in a vehicle is a

a) plane mirror

b) concave mirror

c) convex mirror

d) None of these

Answer: (c)

Question : 6

Which one of the following combinations of aperture and shutter speed of a camera will allow the maximum exposure?

a) f-8, 1/250

b) f-16, 1/125

c) f-22, 1/60

d) f-5.6, 1/1000

Answer: (c)

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