Physics MCQs with Answers for NTS, PPSC, CSS, FPSC, PMS, OTS, PTS Tests and Interviews
This Post contains Physics MCQs with Answers for NTS, PPSC, CSS, FPSC, PMS, OTS, PTS Tests and Interviews. This is the 8th post of Physics Multiple Choice Questions Quiz series. MCQs are taken from Caravan Comprehensive Book. If you want more MCQs of Physics, you can Visit This Post.
Physics Multiple Choice Questions for Competitive Exams
MCQs are starting from No. 141. For previous Physics MCQs Go Here.
141. During rusting________.
(a) Iron gains weight
(b) Iron‘loses weight
(c) Weight of iron remains unchanged
(d) Iron volatilizes
[bg_collapse view=”button-orange” color=”#4a4949″ expand_text=”Show Answer” collapse_text=”Hide Answer” ](a) Iron gains weight[/bg_collapse]
142. When water boils, its temperature________.
(a) Begins to increase
(b) Begins to decrease
(c) Remains constant
(d) Fluctuates
[bg_collapse view=”button-orange” color=”#4a4949″ expand_text=”Show Answer” collapse_text=”Hide Answer” ](c) Remains constant[/bg_collapse]
143. Rectifiers are used to convert_______.
(a) DC to AC
(b) AC to DC
(c) High voltage to low voltage
(d) Low voltage to high voltage
[bg_collapse view=”button-orange” color=”#4a4949″ expand_text=”Show Answer” collapse_text=”Hide Answer” ](b) AC to DC[/bg_collapse]
144. A needle smeared with vaseline when lowered slowly on the surface of the water in a horizontal position appears to float. The phenomenon is an example of_______.
(a) Capillary action
(b) Surface tension
(c) Osmosis
(d) Archimedes principle
[bg_collapse view=”button-orange” color=”#4a4949″ expand_text=”Show Answer” collapse_text=”Hide Answer” ](b) Surface tension[/bg_collapse]
145. Which one of the following statements is correct?
A slab of ice kept in a room _________.
(a) Does not radiate heat
(b) Does not radiate heat but absorbs heat from the surrounding
(c) Radiates heat but absorbs more heat from the surrounding
(d) Radiates heat more than that absorbed by it from the surrounding
[bg_collapse view=”button-orange” color=”#4a4949″ expand_text=”Show Answer” collapse_text=”Hide Answer” ](b) Does not radiate heat but absorbs heat from the surrounding[/bg_collapse]
146. The phenomenon of the formation of three-dimensional image by the interference of two light beams from the laser or other coherent sources of light is called:
(a) Opticai photography
(b) X-ray photography
(c) Radiography
(d) Holography
[bg_collapse view=”button-orange” color=”#4a4949″ expand_text=”Show Answer” collapse_text=”Hide Answer” ](d) Holography[/bg_collapse]
147. Paper becomes brittle and yellow with age, Why?
1. The acid content in paper causes brittleness to develop
2. In the presence of visible light, photosensitised oxidation occurs
3. The ultra-violet component of sunlight causes photolysis of cellulose by direct cleavage of the cellulose polymer
(a) 1 and 2
(b) 2 and 3
(c) 1 and 3
(d) 1. 2 and 3
[bg_collapse view=”button-orange” color=”#4a4949″ expand_text=”Show Answer” collapse_text=”Hide Answer” ](d) 1. 2 and 3[/bg_collapse]
148. Two cars, passing each other at high speed, are in danger of side swiping because ______.
(a) Of the increase in air pressure in the space between them
(b) Of decrease in the velocity of air molecules between them
(c) Of decrease in air pressure in the space between them
(d) Increase in the velocity of air molecules between them
[bg_collapse view=”button-orange” color=”#4a4949″ expand_text=”Show Answer” collapse_text=”Hide Answer” ](c) Of decrease in air pressure in the space between them[/bg_collapse]
149. Which of the following is used as a coolant in nuclear reactors?
(a) Heavy water
(b) Cadmium
(c) Liquid sodium
(d) Graphite
[bg_collapse view=”button-orange” color=”#4a4949″ expand_text=”Show Answer” collapse_text=”Hide Answer” ](c) Liquid sodium[/bg_collapse]
150. Which of the following is good nuclear fuel?
(a) Uranium-238
(b) Neptunium-239
(c) Thorium-236
(d) Plutonium-239
[bg_collapse view=”button-orange” color=”#4a4949″ expand_text=”Show Answer” collapse_text=”Hide Answer” ](d) Plutonium-239[/bg_collapse]
151. In an atomic explosion, enormous energy is released which is due to the _______.
(a) Conversion of neutrons into protons
(b) Conversion of chemical energy into heat energy
(c) Conversion of chemical energy into nuclear energy
(d) Conversion of mass into energy
[bg_collapse view=”button-orange” color=”#4a4949″ expand_text=”Show Answer” collapse_text=”Hide Answer” ](d) Conversion of mass into energy[/bg_collapse]
152. Optic fibres are mainly used for which of the following?
(a) Communication
(b) Weaving
(c) Musical instruments
(d) Food industry
[bg_collapse view=”button-orange” color=”#4a4949″ expand_text=”Show Answer” collapse_text=”Hide Answer” ](a) Communication[/bg_collapse]
153. Which of the following take place when the subject speaks untruth while being tested by the polygraph instrument?
1. His blood pressure goes up.
2. His pulse quickens.
3. His skin darkens.
4. He sneezes.
(a) 1 and 2
(b) 3 and 4
(c) 1, 2 and 3
(d) 2, 1 and 3
[bg_collapse view=”button-orange” color=”#4a4949″ expand_text=”Show Answer” collapse_text=”Hide Answer” ](a) 1 and 2[/bg_collapse]
154. The following processes take place during the launching of a rocket.
1. Rocketfuel is burnt.
2. Gases are produced.
3. The rocket moves in the forward direction.
4. Gases come out with momentum in the backward direction.
The correct sequential order in which the above processes occur is __________.
(a) 1, 2, 3, 4
(b) 1, 3, 2, 4
(c) 1, 2, 4, 3
(d) 1, 3, 4, 2
[bg_collapse view=”button-orange” color=”#4a4949″ expand_text=”Show Answer” collapse_text=”Hide Answer” ](c) 1, 2, 4, 3[/bg_collapse]
155. Aviation fuel for jet aeroplanes consists of purified:
(a) Petrol
(b) Kerosene
(c) Gasoline
(d) Diesel
[bg_collapse view=”button-orange” color=”#4a4949″ expand_text=”Show Answer” collapse_text=”Hide Answer” ](b) Kerosene[/bg_collapse]
156. A silver spoon and a book are both at room temperature. The spoon feels colder to the touch because_______.
(a) Of an illusory effect
(b) Silver is an almost pure material
(c) Silver is a very good heat conductor
(d) it is made of a denser material
[bg_collapse view=”button-orange” color=”#4a4949″ expand_text=”Show Answer” collapse_text=”Hide Answer” ](c) Silver is a very good heat conductor[/bg_collapse]
157. A liquid rises in a syringe when its piston is pulled up because:-
(a) Of the property of surface tension
(b) 0f capillary action
(c) Of the action of atmospheric pressure
(d) There is a force of cohesion between the liquid molecules and the glass syringe
[bg_collapse view=”button-orange” color=”#4a4949″ expand_text=”Show Answer” collapse_text=”Hide Answer” ](c) Of the action of atmospheric pressure[/bg_collapse]
158. A small weight is put on the pressure cooker. It increases the pressure of the steam because:-
(a) The weight is proportionate to the steam required
(b) Area of contact is small
(c) The weight stops the steam from escaping
(d) Of Bernoulli’s principle
[bg_collapse view=”button-orange” color=”#4a4949″ expand_text=”Show Answer” collapse_text=”Hide Answer” ](b) Area of contact is small[/bg_collapse]
159. When an electric bulb breaks, there is a mild sang due to ________.
(a) The chemical reaction between the enclosed gases
(b) The compressed gases rushing out suddenly
(c) The air rushing in to fill the evacuated space
(d) None of the above
[bg_collapse view=”button-orange” color=”#4a4949″ expand_text=”Show Answer” collapse_text=”Hide Answer” ](c) The air rushing in to fill the evacuated space[/bg_collapse]
160. Kinetic energy depends ________.
(a) On the mass of the moving body
(b) The velocity or speed of the moving body
(c) The pressure of the moving body
(d) Both mass and velocity of the moving body
[bg_collapse view=”button-orange” color=”#4a4949″ expand_text=”Show Answer” collapse_text=”Hide Answer” ](d) Both mass and velocity of the moving body[/bg_collapse]
To practice more Physics MCQs with Answers, Click Here.
If there is any mistake in the post, inform us in the comment section.