Physics MCQs Quiz for Competitive Exams.This post contains Physics Objective Questions and Answers for NTS, PPSC, CSS, FPSC, PMS, OTS, PTS Tests and Interviews. These Objective Physics Questions and Answers are to prepare online competitive exams. MCQs are taken from Caravan Comprehensive GK Book.<\/p>\n
1. During rusting ______ ?<\/strong><\/p>\n (a) Iron gains weight<\/span> 2. When water boils, its temperature _______ ?<\/strong><\/p>\n (a) Begins to increase 3. Rectifiers are used to convert ______ ?<\/strong><\/p>\n (a) DC to AC 4. 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 ______ ?<\/strong><\/p>\n (a) Capillary action 5. Which one of the following statements is correct ?<\/strong> (a) Does not radiate heat 6. 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 ?<\/strong><\/p>\n (a) Opticai photography 7. Paper becomes brittle and yellow with age, Why ?<\/strong><\/p>\n 1. The acid content in paper causes brittleness to develop (a) 1 and 2 8. Two cars, passing each other at high speed, are in danger of side swiping because ______ ?<\/strong><\/p>\n (a) Of the increase in air pressure in the space between them 9. Which of the following is used as a coolant in nuclear reactors ?<\/strong><\/p>\n (a) Heavy water 10. Which of the following is good nuclear fuel ?<\/strong><\/p>\n (a) Uranium-238 11. In an atomic explosion, enormous energy is released which is due to the ______ ?<\/strong><\/p>\n (a) Conversion of neutrons into protons<\/p>\n (b) Conversion of chemical energy into heat energy 12. Optic fibres are mainly used for which of the following ?<\/strong><\/p>\n (a) Communication<\/span> 13. Which of the following take place when the subject speaks untruth while being tested by the polygraph instrument ?<\/strong><\/p>\n 1. His blood pressure goes up. (a) 1 and 2<\/span> 14. The following processes take place during the launching of a rocket ?<\/strong><\/p>\n 1. Rocketfuel is burnt. (a) 1, 2, 3, 4 15. Aviation fuel for jet aeroplanes consists of purified ?<\/strong><\/p>\n (a) Petrol See More<\/p>\n Physics General Knowledge MCQs Quiz for Competitive Exams with Answers Set 8<\/a><\/p>\n
\n(b) Iron\u2018loses weight
\n(c) Weight of iron remains unchanged
\n(d) Iron volatilizes<\/p>\n
\n(b) Begins to decrease
\n(c) Remains constant<\/span>
\n(d) Fluctuates<\/p>\n
\n(b) AC to DC<\/span>
\n(c) High voltage to low voltage
\n(d) Low voltage to high voltage<\/p>\n
\n(b) Surface tension<\/span>
\n(c) Osmosis
\n(d) Archimedes principle<\/p>\n
\nA slab of ice kept in a room ________ ?<\/p>\n
\n(b) Does not radiate heat but absorbs heat from the surrounding<\/span>
\n(c) Radiates heat but absorbs more heat from the surrounding
\n(d) Radiates heat more than that absorbed by it from the surrounding<\/p>\n
\n(b) X-ray photography
\n(c) Radiography
\n(d) Holography<\/span><\/p>\n
\n2. In the presence of visible light, photosensitised oxidation occurs
\n3. The ultra-violet component of sunlight causes photolysis of cellulose by direct cleavage of the cellulose polymer<\/p>\n
\n(b) 2 and 3
\n(c) 1 and 3
\n(d) 1. 2 and 3<\/span><\/p>\n
\n(b) Of decrease in the velocity of air molecules between them
\n(c) Of decrease in air pressure in the space between them<\/span>
\n(d) Increase in the velocity of air molecules between them<\/p>\n
\n(b) Cadmium
\n(c) Liquid sodium<\/span>
\n(d) Graphite<\/p>\n
\n(b) Neptunium-239
\n(c) Thorium-236
\n(d) Plutonium-239<\/span><\/p>\n
\n(c) Conversion of chemical energy into nuclear energy
\n(d) Conversion of mass into energy<\/span><\/p>\n
\n(b) Weaving
\n(c) Musical instruments
\n(d) Food industry<\/p>\n
\n2. His pulse quickens.
\n3. His skin darkens.
\n4. He sneezes.<\/p>\n
\n(b) 3 and 4
\n(c) 1, 2 and 3
\n(d) 2, 1 and 3<\/p>\n
\n2. Gases are produced.
\n3. The rocket moves in the forward direction.
\n4. Gases come out with momentum in the backward direction.
\nThe correct sequential order in which the above processes occur is _________ ?<\/strong><\/p>\n
\n(b) 1, 3, 2, 4
\n(c) 1, 2, 4, 3<\/span>
\n(d) 1, 3, 4, 2<\/p>\n
\n(b) Kerosene<\/span>
\n(c) Gasoline
\n(d) Diesel<\/p>\n