TNPSC Physics question & answer - 3
Here we can learn TNPSC questions and answers for Tamil Nadu Public Service Commission (TNPSC) exams, physics questions and answers (set 3), this will also help you to score more marks in all competitive exams and entrance exams like UPSC, RRB, SSC, IBPS, SBI, NEET,... the questions from the ncert books. It is the best place to learn exam preparation study materials for all exams. Previous year's asked Physics questions and answers and also play Physics Quiz. This Quiz makes you more interesting. A list of TNPSC Physics questions and answers is given below.
List of TNPSC Physics MCQs
A list of TNPSC Physics questions and answers is given below.
1. Rainbow is formed due to (a) scattering and refraction (b) internal reflection and dispersion (c) reflection only (d) diffraction and dispersion Ans-b 2. In a junction diode, the holes are due to (a) extra electrons (b) neutrons (c) protons (d) missing of electrons Ans-d 3. Gravitational force is required for (a) stirring of liquid (b) convection (c) conduction (d) radiation Ans-b 4. When a person sitting on a swing stands up on the swing, the frequency of oscillation (a) decreases (b) increases (c) becomes infinite (d) does not change Ans-b 5. Rainbow is seen after rain because of hanging molecules of water which act as (a) lenses (b) mirrors (c) prisms (d) slabs Ans-b 6. When a strong beam of light is passed through a colloidal solution, the light will (a) be scattered (b) pass unchanged (c) be absorbed (d) be reflected Ans-a 7. Optical fibers are based on the phenomenon of (a) Interference (b) Dispersion (c) Diffraction (d) Total Internal Reflection Ans-d 8. Safety fuse wire used in domestic electrical appliances is made of metal of low (a) resistance (b) melting point (c) specific gravity (d) conductance Ans-b 9. Blowing Air with open pipe is an example of (a) isothermal process (b) isochoric process (c) isobaric process (d) adiabatic process Ans-c 10. The rice is cooked more quickly in a pressure cooker because (a) it is covered. (b) less quantity of water is used. (c) none of these. (d) water boils at a higher temperature under pressure. Ans-d 11. A small drop of oil spreads over water because (a) oil has a higher surface tension (a) water has a higher surface tension (a) oil has a higher viscosity (d) water has a higher viscosity Ans-b 12. The device used to convert solar energy into electricity is (a) Photovoltaic cell (b) Daniel cell (c) Electrochemical cell (d) Galvanic cell Ans-a 13. Kepler’s law of planetary motion states that the square of the time period is proportional to the (a) semi-major axis (b) square of the semi-major axis (c) cube of the semi-major axis (d) fourth power of the semi-major axis Ans-c 14. Matter waves are (a) de Broglie waves (b) electromagnetic waves (c) transverse waves (d) longitudinal waves Ans-a 15. A compass needle which is allowed to move in a horizontal plane is taken to a geomagnetic pole. It (a) will become rigid showing no movement (b) will stay in any position (c) will stay in north-south direction only (d) will stay in east-west direction only Ans-b 16. A liquid disturbed by stirring comes to rest due to (a) density (b) surface tension (c) viscosity (d) centripetal force Ans-c 17. Out of the following options which one can be used to produce a propagating electromagnetic wave ? (a) A chargeless particle (b) An accelerating charge (c) A charge moving at constant velocity (d) A stationary charge Ans-b 18. When arsenic is added as an impurity to silicon, the resulting material is (a) n-type conductor (b) n-type semiconductor (c) p-type semiconductor (d) none of these Ans-b 19. Which one among the following shows particle nature of light? (a) photoelectric effect (b) interference (b) refraction (d) polarization Ans-a 20. The magnetic moment of a diamagnetic atom is (a) much greater than one (b) one (c) between zero and one (d) equal to zero Ans-d
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