Physics Nios Plus Two PQ III Welcome to your Physics Nios Plus Two PQ III Total Questions: 50 Name Mobile No: 1. 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: E 0 E/4 E/2 None Hint 2. 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 3. 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 false Both (1) and (2) are true (1) is true, (2) is false (1) is false, (2) is true None Hint 4. Complete the following two sentences using the words given in the bracket (4.18, 4180, increases, decreases): 1 k Calorie = _____________joules 4180 joules 4.18 joules 41.8 joules 418 joules None Hint 5. State Stoke's law. Mention any two of its applications. Stoke's law explains sound waves; used in acoustics and sonar Stoke's law relates to magnetic fields; used in electromagnetics and motors Stoke's law describes the motion of particles in a fluid; used in viscosity measurement and settling velocity Stoke's law explains heat conduction; used in thermodynamics and engines None Hint 6. Give the names of the four factors on which the resistance of a conductor depends. Weight, temperature, length, and color Length, color, shape, and material Volume, length, material, and color Length, cross-sectional area, temperature, and material None Hint 7. 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: 10³ J 10⁻³ J 0.5 x 10³ J -10⁻³ J None Hint 8. Half-life of a radioactive element is 2 years. What fraction of its mass will be left after 8 years? 1/256 1/8 1/2 1/16 None Hint 9. 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 / √(2meV) Wavelength λ = h / p Wavelength λ = h / eV Wavelength λ = h / mv None Hint 10. Give any two differences between the way the electric field and the magnetic field deflect a moving charged particle: Both deflect particles in the same way Electric field only attracts; magnetic field only repels 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 None Hint 11. Give in brief the principle of working of Parachute. Increases air resistance to slow descent Converts kinetic energy to heat Absorbs impact on landing Decreases air resistance to speed descent None Hint 12. In which of the following situations work is done against gravity of earth? 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 A car moves on a horizontal level road None Hint 13. 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: 1/√3 √3 mg/√3 √3 mg 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: 25 cm 75 cm 15 cm 60 cm None Hint 15. A force of 5 N is applied on a body of mass 2 kg. The acceleration of the body will be: 0.4 ms⁻² 10.0 ms⁻² 0.0 ms⁻² 2.5 ms⁻² None Hint 16. Use of a p-n junction diode Oscillator Stabilizer Receiver for remote Rectifier None Hint 17. 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 are wider; Single slit: fringes are narrower Double slit: bright and dark fringes; Single slit: diffraction pattern Double slit: fringes formed by interference; Single slit: fringes formed by diffraction None Hint 18. Minimum number of non-coplanar forces acting on a body to keep it in equilibrium will be: 5 4 2 3 None Hint 19. Use of a transistor Stabilizer Rectifier Receiver for remote Oscillator None Hint 20. 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: 1:9 3:1 9:1 1:1 None Hint 21. 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 22. Through wave motion: only particles are transmitted neither energy nor particles are transmitted only energy is transmitted energy and particles both are transmitted None Hint 23. Give in brief the principle of working of Parachute. Parachute increases air resistance, reducing speed of fall Parachute decreases air resistance, increasing speed Parachute changes direction of motion Parachute absorbs energy of fall None Hint 24. Calculate the excess pressure inside a soap bubble of radius 4 cm. The surface tension of soap solution is 25 × 10⁻³ Nm⁻¹: 3.125 × 10⁻² N/m² 1.25 × 10⁻¹ N/m² 6.25 × 10⁻³ N/m² 5 × 10⁻³ N/m² None Hint 25. The law of conservation of energy is applicable to: Chemical systems only Nuclear systems only Mechanical systems only Every system of the universe None Hint 26. 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 50 N 500 N 50000 N None Hint 27. 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. 50000 N 500 N 5000 N 50 N None Hint 28. State: (i) Zeroth law of thermodynamics (ii) First law of thermodynamics Energy is created; Energy is destroyed Heat cannot flow; Heat can flow freely Pressure and volume relation; Temperature and entropy relation Thermal equilibrium concept; Conservation of energy None Hint 29. The number of electrons that constitute -1 C of charge is: 6.25 x 10¹⁸ 1.6 x 10¹⁹ 6.4 x 10²⁷ 9.0 x 10¹⁸ None Hint 30. 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 31. Work done in displacing a charge q on an equipotential surface through a distance r will be: 4πε₀rq q / 4πε₀r q / 4πε₀r² Zero None Hint 32. 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: 1:1 1:K K:1 K²:1 None Hint 33. Are the various devices in a household circuit connected in series or in parallel? Why? Parallel Neither Both Series None Hint 34. Distinguish between: (i) Pitch and frequency (ii) Loudness and intensity Pitch and loudness both relate to frequency Pitch relates to intensity; Loudness relates to frequency Pitch and intensity both relate to loudness Pitch relates to frequency; Loudness relates to intensity None Hint 35. Give the names of the four factors on which the resistance of a conductor depends: Length, density, color, shape Thickness, color, material, temperature Length, cross-sectional area, material, temperature Length, weight, material, color None Hint 36. 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 remains same Position changes depending on magnetic effect Body moves up Body moves down None Hint 37. Apparent breach of the law of conservation of energy in beta-decay reactions led to the discovery of: Neutron Electron Neutrino Proton None Hint 38. What is meant by photoelectric emission? What does it indicate – particle nature of wave or wave nature of particle? Emission of electrons from metal surface when light shines; particle nature Emission of photons from a metal surface; wave nature Reflection of light from a surface; particle nature Absorption of electrons; wave nature None Hint 39. Distinguish between: (i) Pitch and frequency (ii) Loudness and intensity Pitch depends on frequency, frequency is physical; Loudness is psychological, intensity is physical Pitch and frequency are same; Loudness and intensity are same Frequency depends on pitch; Intensity depends on loudness Pitch depends on amplitude; Loudness depends on wavelength None Hint 40. State Pascal's law. Name any one device based on this law. Total energy in a system remains constant The pressure of a gas is inversely proportional to its volume Energy cannot be created or destroyed Pressure applied to a confined fluid is transmitted undiminished in all directions None Hint 41. Fill in the blanks: A forward biased p-n junction offers _________ resistance to the flow of electrons. high low moderate zero None Hint 42. Fill in the blanks: In a nuclear reactor, moderator is used to _____________ the triggering neutrons. reflect slow down speed up absorb None Hint 43. The maximum number of electrons present in the outermost orbit of any atom is: infinite 32 8 2 None Hint 44. Give any two differences between the way the electric field and the magnetic field deflect a moving charged particle. Electric field does not deflect charged particles Magnetic field deflects only neutral particles Electric field deflects irrespective of velocity; magnetic field deflects only if velocity is present Both deflect particles regardless of velocity None Hint 45. 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: becomes zero increases decreases remains constant None Hint 46. Calculate the excess pressure inside a soap bubble of radius 4 cm. The surface tension of soap solution is 25 × 10⁻³ Nm⁻¹. 0.25 N/m² 0.625 N/m² 0.5 N/m² 1.25 N/m² None Hint 47. A 110 W electric bulb is connected to a 220 V dc supply. The resistance of the bulb is: 2 Ω 220 Ω 110 Ω 440 Ω None Hint 48. Interference is a phenomenon exhibited by: waves only particles only waves as well as particles neither the waves nor the particles None Hint 49. Fill in the blanks: A photodiode is always connected in _____________ biasing. zero reverse forward high None Hint 50. The phenomenon responsible for the formation of rainbow is: interference polarization dispersion diffraction 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
