Physics Nios plus two PQ IV Welcome to your Physics Nios plus two PQ IV Total Questions: 50 Name Mobile No: 1. 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 1:3 1:2 1:4 None Hint 2. Work done in displacing a charge q on an equipotential surface through a distance r will be: q² / 4πε₀r² q / 4πε₀r 4πε₀rq Zero None Hint 3. 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 N/m 10⁻³ N/m 10⁻² N/m 10⁻⁵ N/m None Hint 4. Which of the following laws is used to determine the magnetic field around a current-carrying conductor? Lenz’s Law Faraday’s Law Ampere’s Circuital Law Ohm’s Law None Hint 5. Are household devices connected in series or parallel? Why? Parallel, to reduce resistance only Series, because voltage divides equally Series, because it’s cheaper Parallel, so each gets equal voltage and works independently None Hint 6. 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: 10⁻⁴ J 10⁻⁵ J –10⁻⁴ J 10⁴ J None Hint 7. 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 4 : 1 2 : 1 None Hint 8. The phenomenon responsible for the formation of rainbow is: interference dispersion polarization diffraction None Hint 9. 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: 25 cm 50 cm 15 cm 75 cm None Hint 10. Fill in the blanks: A photodiode is always connected in ___ biasing. Zero Forward Both Reverse None Hint 11. The maximum number of electrons present in the outermost orbit of any atom is: 8 infinite 2 32 None Hint 12. Apparent breach of the law of conservation of energy in beta-decay reactions led to the discovery of: Neutrino Neutron Proton Electron None Hint 13. Applications of photocells include: Used in refrigerators and ovens Used in automatic street lights and burglar alarms Used in thermometers Used in transformers None Hint 14. 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 10⁻⁵ Nm⁻¹ 10⁻³ Nm⁻¹ None Hint 15. SI unit of electric charge is: Volt Coulomb Ampere Ohm None Hint 16. Fill in the blanks: In nuclear reactions ___ is converted into energy. Mass Work Force Charge None Hint 17. 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 44.3 cm 66.3 cm 33.3 cm None Hint 18. Loudness and Intensity Loudness is measurable, intensity is not Loudness is perception; intensity is measurable Both are physical quantities Loudness is measured in W/m² None Hint 19. Complete the sentences: The region of space outside the boundary of a system constitutes its: exterior surroundings thermodynamic universal None Hint 20. 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, False False, False False, True True, True None Hint 21. Which law states that current is directly proportional to voltage? Ohm’s Law Coulomb’s Law Faraday’s Law Ampere’s Law None Hint 22. The law of conservation of energy is applicable to: chemical systems only mechanical systems only nuclear systems only every system of the universe None Hint 23. Minimum number of non-coplanar forces acting on a body to keep it in equilibrium will be: 3 2 5 4 None Hint 24. The resistance of a conductor depends on Length, area, material, and temperature Temperature, density, time, and pressure Mass, volume, pressure, and length Length, height, gravity, and energy None Hint 25. Give in brief the principle of working of Parachute. Buoyant force Surface tension Centripetal force Air resistance None Hint 26. Fill in the blanks: Fusion is also called a ___ reaction. Combustion Fission Nuclear fusion Oxidation None Hint 27. 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 28. Minimum number of non-coplanar forces acting on a body to keep it in equilibrium will be: 4 2 5 3 None Hint 29. What is the dimensional formula of pressure? [M⁰ L⁰ T⁰] [M L² T⁻²] [M L T⁻²] [M L⁻¹ T⁻²] None Hint 30. 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 15 W -15 W Zero None Hint 31. 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: K : 1 K² : 1 1 : K 1 : K² None Hint 32. 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 44.3 cm 66.3 cm 33.3 cm None Hint 33. 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 15 W -15 W Zero None Hint 34. Pitch and Frequency Both are the same Pitch is perception; frequency is measurable Pitch is how loud a sound is; frequency is pitch Pitch is measured in Hz None Hint 35. 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? 500 N 50000 N 50 N 5000 N None Hint 36. The number of electrons that constitute –1 C of charge is: 9.0 × 10¹⁸ 1.6 × 10¹⁹ 6.25 × 10¹⁸ 6.4 × 10²⁷ None Hint 37. Which of the following correctly describes how electric and magnetic fields affect a moving charge? Magnetic field works only on stationary charge Electric field affects parallel to field; magnetic field affects perpendicular Electric field cannot change velocity Both exert force in the direction of motion None Hint 38. 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 F/2 F/4 None Hint 39. Complete the sentences: A system which exhibits thermal, mechanical and chemical equilibrium is said to be in ______equilibrium: exterior surroundings thermodynamic universal None Hint 40. Which of the following is the correct symbol for an n-p-n transistor? Arrow in base terminal Emitter arrow outward, base in middle, collector up No arrow shown Emitter arrow inward, base in middle, collector up None Hint 41. 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/3 E/2 E None Hint 42. Through wave motion: only energy is transmitted only particles are transmitted neither energy nor particles are transmitted energy and particles both are transmitted None Hint 43. A 100 W bulb is connected to a 220 V supply. The current flowing through the bulb is: 11/5 A 10/11 A 5/11 A 11/10 A None Hint 44. 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 45. Fill in the blanks: Efficiency of a heat engine does not depend on the nature of the __. Pressure Temperature Working substance Fuel None Hint 46. Interference is a phenomenon exhibited by: particles only waves as well as particles waves only neither waves nor particles None Hint 47. In which of the following situations work is done against gravity of earth? A car moves on a horizontal level road. A person lifts a load to a certain height in an earth’s natural satellite. A monkey climbs up a tree. A person tries to lift a heavy load but fails to do so. None Hint 48. Fill in the blanks: A forward biased p-n junction offers ___ resistance to the flow of electrons. Medium Low High Zero None Hint 49. 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 50. 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 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
