Physics Nios plus two PQ IV Welcome to your Physics Nios plus two PQ IV Total Questions: 50 Name Mobile No: 1. Loudness and Intensity Both are physical quantities Loudness is measurable, intensity is not Loudness is perception; intensity is measurable Loudness is measured in W/m² None Hint 2. 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: 10⁻⁵ N/m 10⁻⁴ N/m 10⁻³ N/m 10⁻² N/m None Hint 3. Apparent breach of the law of conservation of energy in beta-decay reactions led to the discovery of: Neutrino Proton Electron Neutron None Hint 4. Fill in the blanks: In nuclear reactions ___ is converted into energy. Force Charge Mass Work None Hint 5. Which law states that current is directly proportional to voltage? Faraday’s Law Ampere’s Law Coulomb’s Law Ohm’s Law None Hint 6. 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 1:4 1:3 1:1 None Hint 7. Minimum number of non-coplanar forces acting on a body to keep it in equilibrium will be: 3 2 5 4 None Hint 8. 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 E/2 E/3 E/4 None Hint 9. Fill in the blanks: A forward biased p-n junction offers ___ resistance to the flow of electrons. Zero High Low Medium None Hint 10. 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 33.3 cm 44.3 cm 66.3 cm None Hint 11. Work done in displacing a charge q on an equipotential surface through a distance r will be: 4πε₀rq Zero q / 4πε₀r q² / 4πε₀r² None Hint 12. Applications of photocells include: Used in thermometers Used in refrigerators and ovens Used in automatic street lights and burglar alarms Used in transformers None Hint 13. Which of the following correctly describes how electric and magnetic fields affect a moving charge? Both exert force in the direction of motion Electric field affects parallel to field; magnetic field affects perpendicular Electric field cannot change velocity Magnetic field works only on stationary charge None Hint 14. 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 10⁻⁵ J 10⁻⁴ J –10⁻⁴ J None Hint 15. 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 K : 1 K² : 1 1 : K² None Hint 16. Which of the following laws is used to determine the magnetic field around a current-carrying conductor? Ohm’s Law Faraday’s Law Lenz’s Law Ampere’s Circuital Law None Hint 17. A body is to be kept in equilibrium by some forces. The minimum number of coplanar forces required for this purpose is: 2 4 5 3 None Hint 18. A 100 W bulb is connected to a 220 V supply. The current flowing through the bulb is: 11/10 A 11/5 A 5/11 A 10/11 A None Hint 19. Minimum number of non-coplanar forces acting on a body to keep it in equilibrium will be: 3 4 2 5 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: 6.25 × 10¹⁸ 6 × 10¹⁴ 9 × 10⁹ 1.6 × 10¹⁹ 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 Red Green Violet None Hint 22. Pitch and Frequency Pitch is measured in Hz Both are the same Pitch is how loud a sound is; frequency is pitch Pitch is perception; frequency is measurable None Hint 23. 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, True False, False True, True True, False 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 : 1 1 : 4 2 : 1 4 : 1 None Hint 25. Are household devices connected in series or parallel? Why? Series, because voltage divides equally Series, because it’s cheaper Parallel, so each gets equal voltage and works independently Parallel, to reduce resistance only None Hint 26. Fill in the blanks: Efficiency of a heat engine does not depend on the nature of the __. Fuel Pressure Temperature Working substance None Hint 27. 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 15 W -15 W 30 W None Hint 28. Which of the following is the correct symbol for an n-p-n transistor? No arrow shown Arrow in base terminal Emitter arrow outward, base in middle, collector up Emitter arrow inward, base in middle, collector up None Hint 29. Complete the sentences: The region of space outside the boundary of a system constitutes its: thermodynamic exterior surroundings universal None Hint 30. The law of conservation of energy is applicable to: nuclear systems only mechanical systems only every system of the universe chemical systems only None Hint 31. Interference is a phenomenon exhibited by: waves only waves as well as particles particles only neither waves nor particles None Hint 32. Give in brief the principle of working of Parachute. Air resistance Centripetal force Surface tension Buoyant force None Hint 33. The phenomenon responsible for the formation of rainbow is: polarization dispersion diffraction interference None Hint 34. Fill in the blanks: Fusion is also called a ___ reaction. Fission Nuclear fusion Oxidation Combustion None Hint 35. A 100 W bulb is connected to a 220 V supply. The current flowing through the bulb is: 10/11 A 5/11 A 11/10 A 11/5 A None Hint 36. The number of electrons that constitute –1 C of charge is: 1.6 × 10¹⁹ 9.0 × 10¹⁸ 6.25 × 10¹⁸ 6.4 × 10²⁷ None Hint 37. The maximum number of electrons present in the outermost orbit of any atom is: 8 infinite 2 32 None Hint 38. The resistance of a conductor depends on Length, area, material, and temperature Mass, volume, pressure, and length Temperature, density, time, and pressure Length, height, gravity, and energy None Hint 39. SI unit of electric charge is: Coulomb Ampere Ohm Volt None Hint 40. 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 2F F/4 F/2 None Hint 41. 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 42. In which of the following situations work is done against gravity of earth? A person lifts a load to a certain height in an earth’s natural satellite. A person tries to lift a heavy load but fails to do so. A monkey climbs up a tree. A car moves on a horizontal level road. None Hint 43. 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 44. Fill in the blanks: A photodiode is always connected in ___ biasing. Reverse Zero Both Forward None Hint 45. 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 5000 N 500 N 50000 N None Hint 46. 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: 75 cm 25 cm 15 cm 50 cm None Hint 47. Through wave motion: neither energy nor particles are transmitted energy and particles both are transmitted only energy is transmitted only particles are transmitted None Hint 48. 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: 10⁻³ Nm⁻¹ 10⁻² Nm⁻¹ 10⁻⁵ Nm⁻¹ 10⁻⁴ Nm⁻¹ None Hint 49. Complete the sentences: A system which exhibits thermal, mechanical and chemical equilibrium is said to be in ______equilibrium: universal exterior thermodynamic surroundings None Hint 50. What is the dimensional formula of pressure? [M L⁻¹ T⁻²] [M L² T⁻²] [M⁰ L⁰ T⁰] [M L T⁻²] 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
