Physics MCQs Class 11 | Quiz

Velocity of the efflux is measured by the relation:

A heat engine absorbs 50J of energy and give 45J of work. Its efficiency will be:

(A) 60%
(B) 70%
(C) 80%
(D) 90%

Answer: (D) 90 %

The triple point of water is:

(A) 273K
(B) OK
(C) 273.16K
(D) 37K

Answer: (C) 273.16K

Which is not optically active?

(A) Sugar
(B) Tartaric acid
(C) Water
(D) Milk

Answer: (C) Water

Which waves are used in Sonography?

(A) microwaves
(B) X- rays
(C) ultrasonic waves
(D) Material waves

Answer: (C) ultrasonic waves