Category: Physics MCQs

(A) -32°C
(B) 0°C
(C) 4°C
(D) 100°C

Q. As the temperature rises gradually, it’s surface tension:
(A) goes on increasing
(B) goes on decreasing
(C) remains unchanged
(D) increase only when the heat is too intense

Q. When a beam of light passes from air into water, its speed:
(A) increases
(B) decreases
(C) remains the same
(D) None of these

Answers:
1. (C) 4°C
2. (B) goes on decreasing
3. (B) decreases

(A) 300 million meters per second
(B) 300 million meters per hour
(C) 300 million kilometers per second
(D) 300 million kilometers per hour

Q. The speed of light in vacuum is a universal physical constant, commonly denoted by:
(A) s
(B) d
(C) c
(D) l

Q. Sunlight takes about _______ to travel the average distance from the surface of the sun to the Earth. 
(A) 5 min 17 sec
(B) 6 min 17 sec
(C) 7 min 17 sec
(D) 8 min 17 sec

Answers:
1. (A) 300 million meters per second
2. (C) c
3. (D) 8 min 17 sec