light, heat, thermodynamics, wave motion, sound, optics & oscillations - Category wise Question and Answer Practice Test with Solutions

light, heat, thermodynamics, wave motion, sound, optics & oscillations PRACTICE TEST [16 - EXERCISES]

set 1

set 2

set 3

set 4

set 5

set 6

set 7

set 8

set 9

set 10

set 11

set 12

set 13

set 14

set 15

set 16

Question : 11

Consider the following statements:

  1. Water kept in an open vessel will quickly evaporate on the surface of the moon.
  2. The temperature at the surface of the moon is much higher than boiling point of the water.
  3. Two bodies at different temperatures, if brought in contact do not necessary settle to the mean temperature.
  4. The two bodies may have different thermal capacities.
Which of the statements are correct?

a) 2 and 3

b) 2, 3 and 4

c) 1, 2 and 3

d) 1, 2, 3 and 4

Answer: (d)

Heat is transferred between two or more systems or a system and its surrounding by virtue of temperature difference.

Question : 12

Consider the following statements:

  1. If a person looks at a coin which is in a bucket of water, the coin will appear to be closer than it really is.
  2. If a person under water looks at a coin above the water surface, the coin will appear to be at a higher level than it really is.
Which of the above statement(s) is/are correct?

a) 2 only

b) 1 and 2

c) 1 only

d) None

Answer: (b)

Refraction is the change in direction of a wave due to a change in its speed. This is most commonly observed when a wave passes from one medium to another at any angle other than 90° or 0°.

The refraction of light is the most commonly observed phenomenon.

In both cases, the phenomenon of refraction is applicable because there will be a change in the direction and speed as light enters from one media to other. In case 1 light for an observer outside water the light ray is travelling from a denser medium (water) to a rarer medium (air).

Thus, the image of the coin will appear closer due to refraction. Whereas in case 2 for the observer underwater refraction also takes place but in the opposite way as light travels from a rarer medium (air) to a denser medium (water) .

Thus, the image of the coin will appear at a higher level than the actual position of the coin.

Question : 13

Echo is a type of

a) neither reflected sound nor refracted sound

b) reflected sound

c) refracted sound

d) None of these

Answer: (b)

Question : 14 [UPPCS (Mains) 2006]

The time taken to reach the Sunlight up to the surface of Earth is approximately

a) 8.5 minutes

b) 4.8 sec

c) 4.2 sec

d) 3.6 hours

Answer: (a)

Question : 15 [NDA]

Figure given above shows the part of a long string in which transverse waves are produced. Which pair of points is in phase?

sound oscillations heat thermodynamics question answer 19

a) B and J

b) A and E

c) D and J

d) C and G

Answer: (d)

IMPORTANT general science mcq EXERCISES

set 8 Online Quiz

Click to Start..
1646 light thermodynamics sound optics and oscillations based general science mcq set 8 question answer pdf
general science mcq CATEGORIES

Recently Added Subject & Categories For All Competitive Exams

SSC STENO: Time & Work Questions Solved Problems with PDF

Free Time and work Aptitude-based Practice multiple questions with solutions, Quiz series, Mock Test & Downloadable PDF for SSC Steno (Grade C & D) 2024 Exam

27-Apr-2024 by Careericons

Continue Reading »

SSC STENO 2024: Free Reading Comprehension MCQ Test PDF

Top Reading Comprehension English Section-wise multiple choice questions and answers, Full Mock Test Series & Online Quiz for SSC Steno Grade C & D 2024 Exam

26-Apr-2024 by Careericons

Continue Reading »

Free Percentage Questions Answers for SSC STENO 2024 Exam

Important Top Percentage Aptitude-based multiple choice questions and answers practice quiz series, Online Mock Test PDF for SSC Steno Grade C & D 2024 Exam

25-Apr-2024 by Careericons

Continue Reading »

Free Antonyms (English) MCQ Test for SSC STENO 2024 Exam

Top Antonyms General English Section-based multiple choice questions and answers, Free Full Test Series & Online Quiz PDF for SSC Steno Grade C & D 2024 Exam

24-Apr-2024 by Careericons

Continue Reading »