Physics Nios plus two PQ IV Welcome to your Physics Nios plus two PQ IV Total Questions: 50 Name Mobile No: 1. Are household devices connected in series or parallel? Why? Parallel, so each gets equal voltage and works independently Series, because voltage divides equally Series, because it’s cheaper Parallel, to reduce resistance only None Hint 2. Which of the following statements about diodes is correct? (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. False, False True, True False, True True, False None Hint 3. The phenomenon responsible for the formation of rainbow is: dispersion polarization interference diffraction None Hint 4. A 100 W bulb is connected to a 220 V supply. The current flowing through the bulb is: 11/10 A 11/5 A 10/11 A 5/11 A None Hint 5. A straight power line laid along east-west direction carries a current of 10 A. The earth’s magnetic field at the place is 10⁻⁴ T. Force per metre experienced by the line wire will be: 10⁻² N/m 10⁻⁵ N/m 10⁻⁴ N/m 10⁻³ N/m None Hint 6. SI unit of electric charge is: Volt Coulomb Ampere Ohm None Hint 7. 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 : K² K : 1 K² : 1 1 : K None Hint 8. Which of the following laws is used to determine the magnetic field around a current-carrying conductor? Ampere’s Circuital Law Ohm’s Law Faraday’s Law Lenz’s Law None Hint 9. In a hydraulic lift, a 50 kg mass is on a small piston of 0.01 m². What is the weight lifted by a large piston of 10 m² area? 50 N 50000 N 5000 N 500 N None Hint 10. A particle having charge –1 μC is placed at a point where the electric potential is 100 V. The electric potential energy of the particle is: 10⁴ J 10⁻⁴ J 10⁻⁵ J –10⁻⁴ J None Hint 11. You are given equal number of nuclei of two radioactive elements A and B. The half life of A is 20 minutes and that of B is 40 minutes. After 80 minutes the ratio of number of nuclei in A and B will be: 4 : 1 1 : 4 1 : 1 2 : 1 None Hint 12. A body of mass 2 kg moves with a constant velocity v = 5 m/s, under a constant force of 3 N. The power loss due to frictional force is: Zero 30 W -15 W 15 W None Hint 13. Give in brief the principle of working of Parachute. Centripetal force Air resistance Buoyant force Surface tension None Hint 14. Through wave motion: neither energy nor particles are transmitted energy and particles both are transmitted only particles are transmitted only energy is transmitted None Hint 15. What is the dimensional formula of pressure? [M L² T⁻²] [M⁰ L⁰ T⁰] [M L⁻¹ T⁻²] [M L T⁻²] None Hint 16. 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/3 E/2 E E/4 None Hint 17. Fill in the blanks: Fusion is also called a ___ reaction. Combustion Oxidation Fission Nuclear fusion None Hint 18. A resistance of 5 Ω is connected in the left gap and that of 15 Ω in the right gap of a meter bridge. The position of the null point on the bridge wire from its left end will be: 50 cm 15 cm 25 cm 75 cm None Hint 19. Which law states that current is directly proportional to voltage? Ohm’s Law Coulomb’s Law Ampere’s Law Faraday’s Law None Hint 20. When a glass-rod is rubbed with a piece of silk it acquires a charge of +96 µC. The number of electrons transferred from the glass-rod to the silk piece is: 1.6 × 10¹⁹ 6 × 10¹⁴ 9 × 10⁹ 6.25 × 10¹⁸ None Hint 21. A narrow parallel beam of white light is incident on a concave lens. Which of the following colour light diverges away at the greatest angle from the nearest point? Blue Green Violet Red None Hint 22. Apparent breach of the law of conservation of energy in beta-decay reactions led to the discovery of: Neutron Electron Proton Neutrino None Hint 23. Two charges q₁ and q₂ kept 'd' distance apart, repel each other with a force F. The force between charges 2q₁ and 2q₂ kept '2d' distance apart will be: F/2 2F F F/4 None Hint 24. You are given equal number of nuclei of two radioactive elements A and B. The half-life of A is 20 minutes and that of B is 40 minutes. After 80 minutes the ratio of number of nuclei in A and B will be: 1:2 1:3 1:4 1:1 None Hint 25. Minimum number of non-coplanar forces acting on a body to keep it in equilibrium will be: 3 4 2 5 None Hint 26. The maximum number of electrons present in the outermost orbit of any atom is: 32 8 infinite 2 None Hint 27. 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 car moves on a horizontal level road. A monkey climbs up a tree. None Hint 28. Which of the following is the correct symbol for an n-p-n transistor? No arrow shown Emitter arrow outward, base in middle, collector up Emitter arrow inward, base in middle, collector up Arrow in base terminal None Hint 29. Complete the sentences: The region of space outside the boundary of a system constitutes its: surroundings thermodynamic universal exterior None Hint 30. Work done in displacing a charge q on an equipotential surface through a distance r will be: q² / 4πε₀r² q / 4πε₀r Zero 4πε₀rq None Hint 31. The resistance of a conductor depends on Length, height, gravity, and energy Mass, volume, pressure, and length Temperature, density, time, and pressure Length, area, material, and temperature None Hint 32. A body is to be kept in equilibrium by some forces. The minimum number of coplanar forces required for this purpose is: 5 3 2 4 None Hint 33. Interference is a phenomenon exhibited by: waves as well as particles particles only neither waves nor particles waves only None Hint 34. Fill in the blanks: A forward biased p-n junction offers ___ resistance to the flow of electrons. Medium Low High Zero None Hint 35. In a metre bridge experiment when the resistance in left gap was 2.5 Ω and in right gap 5.0 Ω, the null point was obtained at a distance 'l' from the zero of scale. The value of l is: 22.3 cm 66.3 cm 33.3 cm 44.3 cm None Hint 36. In a metre bridge experiment when the resistance in left gap was 2.5 Ω and in right gap 5.0 Ω, the null point was obtained at a distance 'l' from the zero of scale. The value of l is: 44.3 cm 33.3 cm 22.3 cm 66.3 cm None Hint 37. Fill in the blanks: A photodiode is always connected in ___ biasing. Forward Reverse Both Zero None Hint 38. Complete the sentences: A system which exhibits thermal, mechanical and chemical equilibrium is said to be in ______equilibrium: universal surroundings exterior thermodynamic None Hint 39. A straight power line laid along east-west direction carries a current of 10 A. The earth’s magnetic field at the place is 10⁻⁴ T. Force per metre experienced by the line wire will be: 10⁻⁴ Nm⁻¹ 10⁻² Nm⁻¹ 10⁻³ Nm⁻¹ 10⁻⁵ Nm⁻¹ None Hint 40. Fill in the blanks: In nuclear reactions ___ is converted into energy. Mass Work Force Charge None Hint 41. Minimum number of non-coplanar forces acting on a body to keep it in equilibrium will be: 5 2 3 4 None Hint 42. Fill in the blanks: Efficiency of a heat engine does not depend on the nature of the __. Fuel Temperature Working substance Pressure None Hint 43. A body of mass 2 kg moves with a constant velocity v = 5 m/s, under a constant force of 3 N. The power loss due to frictional force is: 30 W Zero 15 W -15 W None Hint 44. Applications of photocells include: Used in automatic street lights and burglar alarms Used in thermometers Used in refrigerators and ovens Used in transformers None Hint 45. Which of the following correctly describes how electric and magnetic fields affect a moving charge? Electric field cannot change velocity Electric field affects parallel to field; magnetic field affects perpendicular Both exert force in the direction of motion Magnetic field works only on stationary charge None Hint 46. The law of conservation of energy is applicable to: nuclear systems only every system of the universe mechanical systems only chemical systems only None Hint 47. Pitch and Frequency Pitch is how loud a sound is; frequency is pitch Both are the same Pitch is perception; frequency is measurable Pitch is measured in Hz None Hint 48. Loudness and Intensity Loudness is measured in W/m² Loudness is measurable, intensity is not Both are physical quantities Loudness is perception; intensity is measurable None Hint 49. The number of electrons that constitute –1 C of charge is: 6.25 × 10¹⁸ 1.6 × 10¹⁹ 6.4 × 10²⁷ 9.0 × 10¹⁸ None Hint 50. A 100 W bulb is connected to a 220 V supply. The current flowing through the bulb is: 5/11 A 10/11 A 11/10 A 11/5 A None Hint Time's up Share: admin Previous post Physics Nios plus two II July 24, 2025 Next post History Nios Plus Two PQ VI July 30, 2025
