Physics Nios plus two PQ IV Welcome to your Physics Nios plus two PQ IV Total Questions: 50 Name Mobile No: 1. Which of the following correctly describes how electric and magnetic fields affect a moving charge? Both exert force in the direction of motion Magnetic field works only on stationary charge Electric field affects parallel to field; magnetic field affects perpendicular Electric field cannot change velocity None Hint 2. 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 Green Blue Red None Hint 3. The law of conservation of energy is applicable to: nuclear systems only chemical systems only every system of the universe mechanical systems only None Hint 4. A body is to be kept in equilibrium by some forces. The minimum number of coplanar forces required for this purpose is: 2 3 5 4 None Hint 5. 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 2 : 1 1 : 4 4 : 1 None Hint 6. Interference is a phenomenon exhibited by: neither waves nor particles waves only particles only waves as well as particles None Hint 7. Fill in the blanks: Efficiency of a heat engine does not depend on the nature of the __. Working substance Temperature Fuel Pressure None Hint 8. A 100 W bulb is connected to a 220 V supply. The current flowing through the bulb is: 11/10 A 5/11 A 10/11 A 11/5 A None Hint 9. 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 1:2 1:4 1:3 None Hint 10. 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 11. Give in brief the principle of working of Parachute. Centripetal force Air resistance Surface tension Buoyant force None Hint 12. The resistance of a conductor depends on Temperature, density, time, and pressure Mass, volume, pressure, and length Length, height, gravity, and energy Length, area, material, and temperature None Hint 13. 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 14. Loudness and Intensity Loudness is perception; intensity is measurable Loudness is measured in W/m² Both are physical quantities Loudness is measurable, intensity is not None Hint 15. 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 True, True True, False False, False None Hint 16. Which of the following laws is used to determine the magnetic field around a current-carrying conductor? Ohm’s Law Lenz’s Law Faraday’s Law Ampere’s Circuital Law None Hint 17. Fill in the blanks: A forward biased p-n junction offers ___ resistance to the flow of electrons. Medium High Low Zero None Hint 18. 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 1 : K² K : 1 K² : 1 None Hint 19. 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 × 10¹⁴ 9 × 10⁹ 1.6 × 10¹⁹ 6.25 × 10¹⁸ None Hint 20. Fill in the blanks: A photodiode is always connected in ___ biasing. Zero Forward Reverse Both None Hint 21. Fill in the blanks: Fusion is also called a ___ reaction. Combustion Oxidation Nuclear fusion Fission None Hint 22. Are household devices connected in series or parallel? Why? Parallel, to reduce resistance only Parallel, so each gets equal voltage and works independently Series, because voltage divides equally Series, because it’s cheaper None Hint 23. 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 24. 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 25. Which law states that current is directly proportional to voltage? Ampere’s Law Ohm’s Law Faraday’s Law Coulomb’s Law None Hint 26. Minimum number of non-coplanar forces acting on a body to keep it in equilibrium will be: 5 4 3 2 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: 30 W 15 W -15 W Zero None Hint 28. 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 15 cm 25 cm 50 cm None Hint 29. 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 10⁻³ N/m 10⁻⁴ N/m 10⁻⁵ N/m None Hint 30. The number of electrons that constitute –1 C of charge is: 6.4 × 10²⁷ 6.25 × 10¹⁸ 1.6 × 10¹⁹ 9.0 × 10¹⁸ None Hint 31. Applications of photocells include: Used in thermometers Used in automatic street lights and burglar alarms Used in transformers Used in refrigerators and ovens None Hint 32. 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 car moves on a horizontal level road. A monkey climbs up a tree. None Hint 33. 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 33.3 cm 66.3 cm None Hint 34. 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 35. The phenomenon responsible for the formation of rainbow is: interference diffraction polarization dispersion None Hint 36. Fill in the blanks: In nuclear reactions ___ is converted into energy. Charge Mass Force Work 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: F/2 F/4 F 2F None Hint 38. Apparent breach of the law of conservation of energy in beta-decay reactions led to the discovery of: Neutron Proton Neutrino Electron 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. SI unit of electric charge is: Ampere Volt Coulomb Ohm 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. What is the dimensional formula of pressure? [M L T⁻²] [M L² T⁻²] [M⁰ L⁰ T⁰] [M L⁻¹ T⁻²] None Hint 43. 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 44. The maximum number of electrons present in the outermost orbit of any atom is: 32 infinite 2 8 None Hint 45. Minimum number of non-coplanar forces acting on a body to keep it in equilibrium will be: 2 5 3 4 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 10⁻⁴ J –10⁻⁴ J 10⁴ J None Hint 47. Work done in displacing a charge q on an equipotential surface through a distance r will be: 4πε₀rq q² / 4πε₀r² q / 4πε₀r Zero None Hint 48. Complete the sentences: The region of space outside the boundary of a system constitutes its: universal exterior surroundings thermodynamic None Hint 49. 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 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 E/4 E/2 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
