Wednesday, April 24, 2019

WBCS Polity and Constitution MCQs Prelims and Mains

WBCS General Knowledge on General Science (Physics) P3


Physics - 03

11. Both ends of the tube of a Telescope have
(A) Plano-convex lens
(B) Piano concave lens
(C) Convex lens
(D) Concave lens.

Correct Answer: [C] Convex lens.
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12. Among the following select the odd one
(A) Acre
(B) Mile
(C) Metre
(D) Furlong.

Correct Answer: [A] Acre.
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13. The minimum distance between an object and its real image in a convex lens is
(A) Equal to 2f
(B) Equal to 4f
(C) More than 4f
(D) Less than 4f.

Correct Answer: [A] Equal to 2f.
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14. 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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15. The emf of a cell does not depend on
(A) The material of the anode
(B) Electrolyte used
(C) The size of the cell
(D) The material of the cathode.

Correct Answer: [C] The size of the cell.
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