physics multiple choice questions for Odisha Exam !!! Set -4

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physics multiple choice questions for Odisha Exam

Welcome to Digital Odisha , here we provide some physics multiple choice questions for odisha exam, which help to your all odisha competitive exam, like OSSC, OSSSC, Junior clerk, odisha forest guard, ri , amin, otet, ct , bed exam. 

Physics Objective Questions Answer

151. The base of an electric iron is brightly polished mainly
(a) to make it smooth and frictionless
(b) to make it rust – proof
(c) to reduce heat loss by radiation
(d) to make it more durable

(c) to reduce heat loss by radiation

153. Hot water is poured simultaneously in four metallic tumblers painted outside with different paints. After some time the water will be found to have cooled most in the tumbler painted.
(a) rough white
(b) rough black
(c) shining white
(d) shining black

(b) rough black

154. A car parked in the sun with its windows closed gets terribly hot inside. This is due to
(a) the heat emitted by the engine
(b) the greenhouse effect
(c) the good conducting power of the metal body
(d) the double layered wind shield

(b) the greenhouse effect

155. The freezer in a refrigerator is placed near the top
(a) to keep it away from the hot compressor which is near the bottom
(b) because of convenience
(c) so that it can cool the whole interior by setting up convection currents
(d) to prevent too much cooling

(c) so that it can cool the whole interior by setting up convection currents

156. Warm air will hold more water vapour than cold air because
(a) it is lighter
(b) it has more water vapour in it
(c) its molecules are close together
(d) its molecules are far apart

(d) its molecules are far apartwhole interior by setting up convection currents

157. Why is it cool near an open pond on a hot summer day?
(a) Evaporation at the surface causes cooling
(b) The heat obsorbed at the surface is passed on to the bottom
(c) Because of impurity in the water
(d) Because of convection currents set up inside water

(a) Evaporation at the surface causes cooling

158. The radiator in a car serves to
(a) cool the engine
(b) heat up the engine
(c) start the car
(d) moderate the speed

(a) cool the engine

159. The speed at which light travels in vacuum is
(a) 3 x 107 ms-1
(b) 5 x 108 ms-1
(c) 3 x 104 kms-1
(d) 3 x 108 ms-1

(d) 3 x 108 ms-1

160. Light from the sun reaches the earth in
(a) 2 minutes
(b) 4 minutes
(c) 12 minutes
(d) 8 minutes

(d) 8 minutes

161. The shadow below a tree has bright spots in it because
(a) light comes through circular gaps between the leaves
(b) the leaves are circular
(c) the rays bend to form circular spots
(d) the gaps between the leaves act as pin holes

(d) the gaps between the leaves act as pin holes

162. The completely dark portion of a shadow of an object is known as
(a) umbra
(b) penumbra
(c) image
(d) black portion of light

(a) umbra

163. A solar eclipse occurs when the earth, the sun and the moon are in a straight line, and
(a) when the moon passes between the sun and the earth
(b) when the sun comes between the earth and the moon
(c) when the earth comes between the sun and the moon
(d) on a full moon day

(a) when the moon passes between the sun and the earth

164. The image formed by a plane mirror is
(a) of the same size as the object
(b) at the same distance behind the mirror as the object is in front of it
(c) virtual and laterally inverted
(d) All the above

(d) All the above

165. To get 5 images of a single object one should have two plane mirrors inclined at an angle of
(a) 72°
(b) 60°
(c) 36°
(d) 90°

(b) 60°

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