Physics Nios Plus Two PQ III Welcome to your Physics Nios Plus Two PQ III Total Questions: 50 Name Mobile No: 1. Give any two differences between the way the electric field and the magnetic field deflect a moving charged particle. Electric field deflects irrespective of velocity; magnetic field deflects only if velocity is present Electric field does not deflect charged particles Both deflect particles regardless of velocity Magnetic field deflects only neutral particles None Hint 2. Use of a transistor Stabilizer Rectifier Receiver for remote Oscillator None Hint 3. State: (i) Zeroth law of thermodynamics (ii) First law of thermodynamics Pressure and volume relation; Temperature and entropy relation Heat cannot flow; Heat can flow freely Thermal equilibrium concept; Conservation of energy Energy is created; Energy is destroyed None Hint 4. The phenomenon responsible for the formation of rainbow is: interference polarization diffraction dispersion None Hint 5. Complete the following two sentences using the words given in the bracket (4.18, 4180, increases, decreases): 1 k Calorie = _____________joules 41.8 joules 418 joules 4180 joules 4.18 joules None Hint 6. A body of mass ‘m’ just starts sliding down an inclined plane when the plane makes an angle of 30° with the vertical. The coefficient of friction between the surface of the plane and the block will be: √3 √3 mg 1/√3 mg/√3 None Hint 7. The ratio of the magnetic fields at the centres of two circular loops of radius 5 cm and 15 cm, carrying current 3 A and 1 A respectively, will be: 9:1 1:9 1:1 3:1 None Hint 8. Work done in displacing a charge q on an equipotential surface through a distance r will be: Zero q / 4πε₀r² 4πε₀rq q / 4πε₀r None Hint 9. The law of conservation of energy is applicable to: Nuclear systems only Chemical systems only Mechanical systems only Every system of the universe None Hint 10. Through wave motion: energy and particles both are transmitted neither energy nor particles are transmitted only particles are transmitted only energy is transmitted None Hint 11. Use of a p-n junction diode Rectifier Oscillator Receiver for remote Stabilizer None Hint 12. A body of mass 50 kg is placed on the smaller piston of a hydraulic lift. If the area of the smaller piston is 0.1 m² and that of the bigger piston is 10 m², calculate the weight of the car which can be lifted by this body: 5000 N 500 N 50000 N 50 N None Hint 13. Minimum number of non-coplanar forces acting on a body to keep it in equilibrium will be: 5 3 2 4 None Hint 14. A resistance of 5 Ω is connected in the left gap and that of 15 Ω is connected in the right gap of a metre-bridge. The position of the null point on the bridge wire from its left end will be: 75 cm 15 cm 60 cm 25 cm None Hint 15. Consider a body suspended from a vertical spring. How will the position of the body change when a current is passed through the spring? Explain. Position changes depending on magnetic effect Body moves down Body moves up Position remains same None Hint 16. In which of the following situations work is done against gravity of earth? A car moves on a horizontal level road A person tries to lift a heavy load but fails to do so A person lifts a load to a certain height in an earth’s natural satellite A monkey climbs up a tree None Hint 17. Are the various devices in a household circuit connected in series or in parallel? Why? Neither Both Series Parallel None Hint 18. Apparent breach of the law of conservation of energy in beta-decay reactions led to the discovery of: Neutron Electron Proton Neutrino None Hint 19. A force of 5 N is applied on a body of mass 2 kg. The acceleration of the body will be: 2.5 ms⁻² 0.4 ms⁻² 10.0 ms⁻² 0.0 ms⁻² None Hint 20. What is meant by: (i) an isothermal process (ii) an adiabatic process (i) Constant temperature process (ii) No heat exchange process (i) No heat exchange process (ii) Constant temperature process (i) Constant volume process (ii) Constant pressure process (i) Constant pressure process (ii) Constant volume process None Hint 21. The maximum number of electrons present in the outermost orbit of any atom is: infinite 2 8 32 None Hint 22. Give the names of the four factors on which the resistance of a conductor depends. Weight, temperature, length, and color Volume, length, material, and color Length, color, shape, and material Length, cross-sectional area, temperature, and material None Hint 23. A 110 W electric bulb is connected to a 220 V dc supply. The resistance of the bulb is: 2 Ω 110 Ω 220 Ω 440 Ω None Hint 24. The electrostatic force between two point charges kept in air at a distance ‘d’ is F1 and F2 at the same distance in a medium of dielectric constant K. The ratio F1 : F2 is equal to: 1:K 1:1 K:1 K²:1 None Hint 25. What is meant by photoelectric emission? What does it indicate – particle nature of wave or wave nature of particle? Reflection of light from a surface; particle nature Emission of photons from a metal surface; wave nature Absorption of electrons; wave nature Emission of electrons from metal surface when light shines; particle nature None Hint 26. Fill in the blanks: A forward biased p-n junction offers _________ resistance to the flow of electrons. moderate low zero high None Hint 27. Complete the following two sentences using the words given in the bracket (4.18, 4180, increases, decreases): When work is done on a system, the internal energy of the system: increases becomes zero decreases remains constant None Hint 28. State de-Broglie's concept of matter waves. Write expression for de-Broglie wavelength associated with an electron accelerated through a potential difference of V volts. Wavelength λ = h / eV Wavelength λ = h / p Wavelength λ = h / mv Wavelength λ = h / √(2meV) None Hint 29. Write true for correct statement and false for incorrect statement: (i) A NOT gate uses two p-n junctions (ii) When a Zener diode is not working on its optimum voltage condition, the load draws less power than the power dissipated in the diode. Both (1) and (2) are true (1) is false, (2) is true (1) is true, (2) is false Both (1) and (2) are false None Hint 30. A negative charge of 20 μC is placed at a point where the electric potential is 50 V. The electric potential energy of the particle is: 10⁻³ J 0.5 x 10³ J -10⁻³ J 10³ J None Hint 31. Give any two differences between the way the electric field and the magnetic field deflect a moving charged particle: Electric field does not affect charged particles; magnetic field does Electric field exerts force on stationary charges; magnetic field exerts force only on moving charges Both deflect particles in the same way Electric field only attracts; magnetic field only repels None Hint 32. Interference is a phenomenon exhibited by: neither the waves nor the particles waves as well as particles particles only waves only None Hint 33. State Stoke's law. Mention any two of its applications. Stoke's law explains heat conduction; used in thermodynamics and engines Stoke's law describes the motion of particles in a fluid; used in viscosity measurement and settling velocity Stoke's law relates to magnetic fields; used in electromagnetics and motors Stoke's law explains sound waves; used in acoustics and sonar None Hint 34. Write any three distinguishing features of the fringe patterns formed in Young’s double slit experiment and single slit diffraction. All of the above Double slit: fringes formed by interference; Single slit: fringes formed by diffraction Double slit: fringes are wider; Single slit: fringes are narrower Double slit: bright and dark fringes; Single slit: diffraction pattern None Hint 35. Give the names of the four factors on which the resistance of a conductor depends: Length, weight, material, color Thickness, color, material, temperature Length, density, color, shape Length, cross-sectional area, material, temperature None Hint 36. Distinguish between: (i) Pitch and frequency (ii) Loudness and intensity Pitch and frequency are same; Loudness and intensity are same Pitch depends on amplitude; Loudness depends on wavelength Frequency depends on pitch; Intensity depends on loudness Pitch depends on frequency, frequency is physical; Loudness is psychological, intensity is physical None Hint 37. A body of mass 50 kg is placed on the smaller piston of a hydraulic lift. If the area of the smaller piston is 0.1 m² and that of the bigger piston is 10 m², calculate the weight of the car which can be lifted by this body. 50 N 500 N 50000 N 5000 N None Hint 38. Fill in the blanks: In a nuclear reactor, moderator is used to _____________ the triggering neutrons. reflect speed up absorb slow down None Hint 39. Distinguish between: (i) Pitch and frequency (ii) Loudness and intensity Pitch relates to intensity; Loudness relates to frequency Pitch and intensity both relate to loudness Pitch relates to frequency; Loudness relates to intensity Pitch and loudness both relate to frequency None Hint 40. A particle is projected at an angle of 60° to the horizontal with a certain kinetic energy E. Its kinetic energy at the highest point of its path will be: 0 E/2 E/4 E None Hint 41. State Pascal's law. Name any one device based on this law. Pressure applied to a confined fluid is transmitted undiminished in all directions Total energy in a system remains constant The pressure of a gas is inversely proportional to its volume Energy cannot be created or destroyed None Hint 42. A parallel beam of white light is incident on a convex lens. Which of the following colours will converge nearest to its optical focus? Blue Yellow Red Green None Hint 43. Give in brief the principle of working of Parachute. Parachute decreases air resistance, increasing speed Parachute absorbs energy of fall Parachute increases air resistance, reducing speed of fall Parachute changes direction of motion None Hint 44. Calculate the excess pressure inside a soap bubble of radius 4 cm. The surface tension of soap solution is 25 × 10⁻³ Nm⁻¹: 6.25 × 10⁻³ N/m² 5 × 10⁻³ N/m² 3.125 × 10⁻² N/m² 1.25 × 10⁻¹ N/m² None Hint 45. Calculate the excess pressure inside a soap bubble of radius 4 cm. The surface tension of soap solution is 25 × 10⁻³ Nm⁻¹. 0.625 N/m² 1.25 N/m² 0.5 N/m² 0.25 N/m² None Hint 46. Fill in the blanks: In fission reaction, the energy released is 0.84 MeV/u whereas in fusion reaction, the energy released is _________ MeV/u. 2 8 4 10 None Hint 47. Half-life of a radioactive element is 2 years. What fraction of its mass will be left after 8 years? 1/16 1/8 1/2 1/256 None Hint 48. Fill in the blanks: A photodiode is always connected in _____________ biasing. reverse forward zero high None Hint 49. Give in brief the principle of working of Parachute. Decreases air resistance to speed descent Absorbs impact on landing Converts kinetic energy to heat Increases air resistance to slow descent None Hint 50. The number of electrons that constitute -1 C of charge is: 1.6 x 10¹⁹ 6.4 x 10²⁷ 6.25 x 10¹⁸ 9.0 x 10¹⁸ None Hint Time's up Share: admin Previous post Business Studies Nios plus two PQ VI July 3, 2025 Next post Chemistry Nios Plus Two PQ July 5, 2025
