Physics Nios plus two PQ IV Welcome to your Physics Nios plus two PQ IV Total Questions: 50 Name Mobile No: 1. A 100 W bulb is connected to a 220 V supply. The current flowing through the bulb is: 11/5 A 5/11 A 11/10 A 10/11 A None Hint 2. Are household devices connected in series or parallel? Why? Series, because voltage divides equally Parallel, to reduce resistance only Series, because it’s cheaper Parallel, so each gets equal voltage and works independently None Hint 3. 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 : 1 1 : 4 2 : 1 None Hint 4. Applications of photocells include: Used in refrigerators and ovens Used in automatic street lights and burglar alarms Used in transformers Used in thermometers None Hint 5. 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: 33.3 cm 66.3 cm 22.3 cm 44.3 cm None Hint 6. Apparent breach of the law of conservation of energy in beta-decay reactions led to the discovery of: Neutron Proton Neutrino Electron None Hint 7. Fill in the blanks: A forward biased p-n junction offers ___ resistance to the flow of electrons. Low High Zero Medium None Hint 8. Through wave motion: only energy is transmitted energy and particles both are transmitted neither energy nor particles are transmitted only particles are transmitted None Hint 9. Fill in the blanks: A photodiode is always connected in ___ biasing. Zero Both Reverse Forward None Hint 10. Loudness and Intensity Loudness is perception; intensity is measurable Both are physical quantities Loudness is measurable, intensity is not Loudness is measured in W/m² None Hint 11. 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: 2F F/2 F/4 F None Hint 12. Work done in displacing a charge q on an equipotential surface through a distance r will be: q² / 4πε₀r² 4πε₀rq Zero q / 4πε₀r None Hint 13. Which law states that current is directly proportional to voltage? Ampere’s Law Coulomb’s Law Ohm’s Law Faraday’s Law None Hint 14. Fill in the blanks: Fusion is also called a ___ reaction. Nuclear fusion Oxidation Combustion Fission None Hint 15. The law of conservation of energy is applicable to: chemical systems only every system of the universe mechanical systems only nuclear systems only None Hint 16. Which of the following laws is used to determine the magnetic field around a current-carrying conductor? Lenz’s Law Ohm’s Law Faraday’s Law Ampere’s Circuital Law None Hint 17. 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 6.25 × 10¹⁸ 9 × 10⁹ 6 × 10¹⁴ None Hint 18. 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 1:1 1:4 None Hint 19. A 100 W bulb is connected to a 220 V supply. The current flowing through the bulb is: 11/5 A 5/11 A 10/11 A 11/10 A None Hint 20. The maximum number of electrons present in the outermost orbit of any atom is: 32 infinite 2 8 None Hint 21. 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 1 : K K² : 1 None Hint 22. Give in brief the principle of working of Parachute. Centripetal force Surface tension Buoyant force Air resistance None Hint 23. 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 24. SI unit of electric charge is: Ampere Coulomb Ohm Volt None Hint 25. In which of the following situations work is done against gravity of earth? A monkey climbs up a tree. 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. None Hint 26. Fill in the blanks: In nuclear reactions ___ is converted into energy. Mass Force Work Charge None Hint 27. Minimum number of non-coplanar forces acting on a body to keep it in equilibrium will be: 4 2 3 5 None Hint 28. Pitch and Frequency Pitch is perception; frequency is measurable Pitch is how loud a sound is; frequency is pitch Both are the same Pitch is measured in Hz None Hint 29. Which of the following correctly describes how electric and magnetic fields affect a moving charge? Electric field cannot change velocity Magnetic field works only on stationary charge Electric field affects parallel to field; magnetic field affects perpendicular Both exert force in the direction of motion None Hint 30. Complete the sentences: A system which exhibits thermal, mechanical and chemical equilibrium is said to be in ______equilibrium: surroundings exterior thermodynamic universal None Hint 31. 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: -15 W 15 W Zero 30 W None Hint 32. The phenomenon responsible for the formation of rainbow is: interference polarization dispersion diffraction None Hint 33. 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? Violet Red Blue Green None Hint 34. 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: 15 cm 50 cm 75 cm 25 cm None Hint 35. Interference is a phenomenon exhibited by: particles only waves only waves as well as particles neither waves nor particles None Hint 36. What is the dimensional formula of pressure? [M⁰ L⁰ T⁰] [M L T⁻²] [M L² T⁻²] [M L⁻¹ T⁻²] None Hint 37. Complete the sentences: The region of space outside the boundary of a system constitutes its: surroundings exterior universal thermodynamic None Hint 38. Minimum number of non-coplanar forces acting on a body to keep it in equilibrium will be: 4 5 2 3 None Hint 39. A body is to be kept in equilibrium by some forces. The minimum number of coplanar forces required for this purpose is: 3 2 4 5 None Hint 40. 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. True, True True, False False, False False, True None Hint 41. Which of the following is the correct symbol for an n-p-n transistor? Emitter arrow inward, base in middle, collector up Arrow in base terminal Emitter arrow outward, base in middle, collector up No arrow shown None Hint 42. 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: -15 W 15 W 30 W Zero None Hint 43. The number of electrons that constitute –1 C of charge is: 6.4 × 10²⁷ 6.25 × 10¹⁸ 9.0 × 10¹⁸ 1.6 × 10¹⁹ None Hint 44. 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 Nm⁻¹ 10⁻⁵ Nm⁻¹ 10⁻⁴ Nm⁻¹ 10⁻³ Nm⁻¹ None Hint 45. Fill in the blanks: Efficiency of a heat engine does not depend on the nature of the __. Temperature Pressure Working substance Fuel None Hint 46. 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 66.3 cm 33.3 cm 22.3 cm None Hint 47. The resistance of a conductor depends on Length, area, material, and temperature Temperature, density, time, and pressure Length, height, gravity, and energy Mass, volume, pressure, and length None Hint 48. 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? 5000 N 50000 N 50 N 500 N None Hint 49. 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 10⁻³ N/m 10⁻⁴ N/m None Hint 50. 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/4 E/2 E E/3 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
