Wednesday, April 24, 2019

WBCS Polity and Constitution MCQs Prelims and Mains

General Science (Physics) Practice Sets For WBCS Prelims P2

Physics - 02

6. A piece of cotton cloth gets wet if one end of it is dipped in water in a glass. This is due to
(A) Elasticity
(B) Capillarity
(C) Gravitation
(D) Viscosity.

Correct Answer: [B] Capillarity.
7. When an object is placed between two parallel mirrors, the number of images formed will be
(A) Thirty-Two
(B) Infinite
(C) Eight
(D) Two.

Correct Answer: [B] Infinite.
8. An example of a scalar quantity is
(A) Momentum
(B) Energy
(C) Velocity
(D) Force.

Correct Answer: [B] Energy.
9. Which one will you correct myopic vision?
(A) A convex lens of proper power
(B) Convex spectacle lens of suitable length
(C) A concave lens of suitable focal length
(D) Sphero-cylindrical lens.

Correct Answer: [C] A concave lens of suitable focal length.
10. A piece of a metal plate with a circular hole is heated. If the metal plate expands on heating, the diameter of the hole will
(A) Increase or decrease depending on the diameter of the hole
(B) Increase or decrease depending upon the metering of the plate
(C) increase
(D) Decrease.

Correct Answer: [C] increase.


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