Physics Nios plus two PQ IV Welcome to your Physics Nios plus two PQ IV Total Questions: 50 Name Mobile No: 1. Fill in the blanks: A photodiode is always connected in ___ biasing. Both Zero Reverse Forward None Hint 2. The phenomenon responsible for the formation of rainbow is: interference diffraction dispersion polarization None Hint 3. Complete the sentences: The region of space outside the boundary of a system constitutes its: universal surroundings exterior thermodynamic None Hint 4. The number of electrons that constitute –1 C of charge is: 1.6 × 10¹⁹ 6.4 × 10²⁷ 9.0 × 10¹⁸ 6.25 × 10¹⁸ None Hint 5. Complete the sentences: A system which exhibits thermal, mechanical and chemical equilibrium is said to be in ______equilibrium: universal surroundings thermodynamic exterior None Hint 6. Fill in the blanks: Efficiency of a heat engine does not depend on the nature of the __. Fuel Temperature Pressure Working substance None Hint 7. Loudness and Intensity Both are physical quantities Loudness is measurable, intensity is not Loudness is measured in W/m² Loudness is perception; intensity is measurable None Hint 8. Pitch and Frequency Pitch is how loud a sound is; frequency is pitch Both are the same Pitch is measured in Hz Pitch is perception; frequency is measurable None Hint 9. What is the dimensional formula of pressure? [M L² T⁻²] [M L T⁻²] [M⁰ L⁰ T⁰] [M L⁻¹ T⁻²] None Hint 10. Work done in displacing a charge q on an equipotential surface through a distance r will be: Zero q² / 4πε₀r² q / 4πε₀r 4πε₀rq None Hint 11. 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 12. A 100 W bulb is connected to a 220 V supply. The current flowing through the bulb is: 11/5 A 10/11 A 11/10 A 5/11 A None Hint 13. Minimum number of non-coplanar forces acting on a body to keep it in equilibrium will be: 4 5 2 3 None Hint 14. 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 500 N 50 N 50000 N None Hint 15. Which of the following correctly describes how electric and magnetic fields affect a moving charge? Electric field affects parallel to field; magnetic field affects perpendicular Electric field cannot change velocity Both exert force in the direction of motion Magnetic field works only on stationary charge None Hint 16. 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 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: 6.25 × 10¹⁸ 9 × 10⁹ 6 × 10¹⁴ 1.6 × 10¹⁹ None Hint 18. 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 N/m 10⁻⁴ N/m 10⁻⁵ N/m 10⁻² N/m None Hint 19. Through wave motion: only energy is transmitted only particles are transmitted energy and particles both are transmitted neither energy nor particles are transmitted None Hint 20. Minimum number of non-coplanar forces acting on a body to keep it in equilibrium will be: 4 3 2 5 None Hint 21. The resistance of a conductor depends on Temperature, density, time, and pressure Length, area, material, and temperature Length, height, gravity, and energy Mass, volume, pressure, and length None Hint 22. 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: 66.3 cm 22.3 cm 44.3 cm 33.3 cm None Hint 23. 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 1 : K² K² : 1 1 : K None Hint 24. Fill in the blanks: Fusion is also called a ___ reaction. Nuclear fusion Combustion Oxidation Fission None Hint 25. 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 26. 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 Zero 30 W 15 W None Hint 27. 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 28. Fill in the blanks: A forward biased p-n junction offers ___ resistance to the flow of electrons. High Medium Low Zero None Hint 29. A body is to be kept in equilibrium by some forces. The minimum number of coplanar forces required for this purpose is: 3 5 2 4 None Hint 30. In which of the following situations work is done against gravity of earth? A monkey climbs up a tree. 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. None Hint 31. 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 32. Give in brief the principle of working of Parachute. Air resistance Buoyant force Surface tension Centripetal force None Hint 33. 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 1:1 1:4 1:3 None Hint 34. Which law states that current is directly proportional to voltage? Ampere’s Law Ohm’s Law Coulomb’s Law Faraday’s Law None Hint 35. SI unit of electric charge is: Coulomb Ampere Ohm Volt None Hint 36. 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 37. 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/4 F/2 None Hint 38. Fill in the blanks: In nuclear reactions ___ is converted into energy. Mass Force Work Charge None Hint 39. Interference is a phenomenon exhibited by: waves only particles only neither waves nor particles waves as well as particles None Hint 40. Applications of photocells include: Used in automatic street lights and burglar alarms Used in transformers Used in refrigerators and ovens Used in thermometers None Hint 41. 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 42. The law of conservation of energy is applicable to: every system of the universe nuclear systems only mechanical systems only chemical systems only None Hint 43. 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 25 cm 15 cm 75 cm None Hint 44. 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 False, True True, False True, True None Hint 45. The maximum number of electrons present in the outermost orbit of any atom is: 32 2 infinite 8 None Hint 46. 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: 10⁻⁵ J 10⁴ J 10⁻⁴ J –10⁻⁴ J None Hint 47. 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 Zero 15 W 30 W None Hint 48. Which of the following is the correct symbol for an n-p-n transistor? Arrow in base terminal Emitter arrow inward, base in middle, collector up No arrow shown Emitter arrow outward, base in middle, collector up None Hint 49. Apparent breach of the law of conservation of energy in beta-decay reactions led to the discovery of: Neutrino Electron Proton Neutron 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
