PHYSICS ONE SHOT NOTES.pdf

PARMAR SSC PHYSICS ONE SHOT NOTES For Notes Join Telegram : Click on the icon. For Lectures Subscribe Our Parmar SSC Youtube Channel Click on the icon.  PHYSICS – ONESHOT 2024 1. Which type of electromagnetic radiation was discovered by Johann Wilh...

PARMAR SSC PHYSICS ONE SHOT NOTES For Notes Join Telegram : Click on the icon. For Lectures Subscribe Our Parmar SSC Youtube Channel Click on the icon.  PHYSICS – ONESHOT 2024 1. Which type of electromagnetic radiation was discovered by Johann Wilhelm Ritter in 1801? Ultraviolet rays 2. In which year did Eric A. Cornell, Wolfgang Ketterle and Carl E. Wieman receive the Nobel Prize in Physics for the achieving 'Bose-Einstein condensation in dilute gases of alkali atoms'? 2001 3. In which year did Hans Christian Oersted discover that a compass needle gets deflected when an electric current passes through a metallic wire placed nearby? 1820 4. If an object of mass 2 kg is dropped from a height of 10 metres, what will be the ratio of its potential energy and kinetic energy at the height of 5 metres (g=10m/sec²) Ans. 1:1 5. In which year did Galileo describe the regular, swinging motion of a pendulum by the action of gravity and acquired momentum? 1602 6. Who calculated the approximate location of the planet Neptune by studying gravity-induced disturbances in the motion of Uranus? Urbain-Jean-Joseph Le Verrier 7. For which discovery did Henri Becquerel receive the Nobel Prize in Physics in 1903?. Spontaneous Radioactivity 8. Who among the following discovered that a wire carrying electric current can attract or repel another wire next to it that's also carrying electric current?. Andre-Marie Ampere 9. Who among the following confirmed Maxwell's theories with the discovery of radio waves and also became the first person to transmit and receive controlled radio waves in 1886? Heinrich Hertz 10. For which of the following discoveries in 1827 was the German physicist, Georg Simon Ohm best known? For clarifying the mathematical relationship between electrical current, resistance and voltage 11. In an electrical circuit, the ammeter reading decreases half, when the length of the wire is doubled. 12. Who proposed that 'Light is made up of waves propagating perpendicular to the direction of its movement'? Huygens 13. What is the wavelength range of visible light? 0.4 to 0.7 μm 14. A circular coil having 'n' turns produces a field ____ times large as that produced by a single turn. Ans. N 15. Magnetic Field inside a Solenoid is ? Constant & Maximum 16. Which of the following is NOT an example of inertia at rest? The sudden application of brakes in a vehicle 17. FORCE : Force may change the direction of a moving object Force may make an object move Force may change the shape of an object 18. Which of the following devices is used to accelerate charged particles to high velocities? Cyclotron 19. Which device is used to measure the current flow using needle deflection caused by a magnetic field force acting upon a current-carrying wire? Galvanometer 20. Identify the device used to change the resistance in an electric circuit. Rheostat 21. F = ma 22. Who among the following physicists invented the voltaic pile, the forerunner of the modern battery, in 1800? Alessandro Volta 23. In 1905, who concluded with Thomas Chamberlain that the planets of the Solar System originated from an encounter between the Sun and another star? James Hutton 24. Which of the following is used for determining the value of 1 ampere. A=1C/s 25. Which of the following forces can only be applied when in contact with an object ? Frictional force 26. Which of the following statement/statements is/are true regarding the light year? Light year is a unit of distance A light year is the distance that light travels in one Earth year 27. Which rule determines Force Acting on a Conductor carrying current in a Magnetic Field ? Fleming’s Left Hand Rule 28. Physicist – Contributions : Albert Einstein - Explanation of photoelectric effect Michael Faraday - Laws of electromagnetic induction Hugens - Wave theory of light Heinrich Rudolf Hertz - Generation of electromagnetic waves 29. Which part of the bifocal lens facilitates near vision? Lower part with convex lens 30. Which physicist is known to establish the relationship between mechanical work and heat transfer ? James Prescott Joule 31. What kind of energy does a yo-yo have before it is released? Potential energy 32. An Earthquake : When the stress on the edge overcomes the friction, there is an earthquake that releases energy in waves that travel through Earth's crust and causes the shaking that we feel An earthquake cannot be identified as a foreshock until after a larger earthquake in the same area occurs. 33. What is the SI unit of force? Newton 34. Pascal is the SI unit of _________which is defined as a force of 1 N applied uniformly over an area of 1 m². Pressure 35. Which wave oscillates parallel to the direction of Motion ? Longitudinal wave 36. It is difficult to carry a heavy shopping bag with thin handles by hand, but slightly easier when the handles are covered with a thick piece of cloth. What is the reason behind that? Increase in surface area reduces the force exerted 37. Ex of Vector Quantity : Acceleration, Velocity, Force 38. Sahil Sarabhai is standing in the middle. On one side, his wife Monisha is pulling him with a force of 100 N eastward, whereas his mother, Maya is pulling him with a force of 150 N westward. What will be the net force on Sahil and towards whom will he move in the end if at all? 50N, Maya 39. In 1800, which of the following experimental achievements was made by William Nicholson? Discovery of water electrolysis 40. What is the unit of electric current? Ampere 41. Why is it always emphasised NOT to touch any electric switch board with wet hands ? Combination of water and our body is a good conductor of electricity 42. Before starting a 5 day and 5 night excursion, Mr. Patel provided all his students with battery powered flash lights. He also gave them some extra batteries to use as spare. Then Mr. Patel asked them whether they know how the batteries will produce electricity and help them. What  do you think the correct answer to his question is? Electricity is produced by the chemicals stored in the battery 43. The Greek letter 'Omega' is used to represent which physical quantity in the International System of Units (SI)? Electric resistance 44. The SI unit of which fundamental physical quantity is named in the honour of Charles Augustin Coulomb? Electric charge 45. A milliamp is a unit of measurement of electric current, which is equal to how many amps? 0.001 AMP 46. Otto von Guericke was the most prominent person known for which invention in the 17th century? Air Pump 47. Which of the following is used as a cooling medium for the Large Hadron Collider (LHC) and the superconducting magnets in MRI scanners and NMR spectrometers ? Helium, Janssen + Lockyer 48. Seismograph – Earthquake Waves 49. For which discovery did William Bradford Shockley, John Bardeen and Walter Houser Brattain jointly receive the Nobel Prize in Physics in 1956? Transistors Semiconductors : ( B, Ge, Sb, Si ) N-type Semiconductors : e- majority carriers ; Doping with P/Sb P-type Semiconductors : holes majority carriers ; Doping with Boron/Indium 50. A non-SI unit called ‘nit’ is the unit of which of the following photometric quantities used to measure a multitude of light intensity? Luminosity SI unit : Cd/m^2 Cd : Luminous intensity 51. Surface Tension : elastic tendency of fluid surface. Term given by Agnes Pockles. Due to this water drop become Sphericial Shape ; At room temperature, surface tension of water is not less than ethyl alcohol Cohesive Force : particles of same surface Adhesive Force : particles/molecules of different surface 52. Where is the image formed in a Concave Mirror when the object is placed at the Centre of Curvature ? (Khata ) Virtual, same, size, erect, laterally, inverted 53. Whose law states that total energy per unit mass of flowing fluid, at any point in the subsurface, is the sum of the kinetic, potential, and fluid-pressure energy and is equal to a constant value? Bernoulli’s Theorem 54. Which pioneer scientist used radio waves to transmit signals over distances of several kilometres in the 1890s? Marconi 55. When did Henry Cavendish report the measurement of the gravitational constant with the mass and density of the Earth? 1798 G = 6.67 × 10^-11 Nm^2/kg^2 56. The famous physicist Victor Franz Hess is known for the discovery of: Cosmic Rays 1912 Harry Hens : Sea Floor Spreading Theory 57. In 1995, with whom did Eric Cornell experimentally produce the first BoseEinstein condensate in a rarefied gas of rubidium atoms at extremely low temperatures? Carl Wieman 58. Assertion – Reason : (A): An object slips less on a rough surface than a smooth surface.  (R): When a surface is rough, frictional force increases. 59. What is an instrument that sends pulses of electromagnetic energy into the atmosphere to detect rainfall, determine its speed and intensity, and identify precipitation types such as rain, snow or hail? Barrometer 60. Whose research was fundamental in establishing the modern discipline known as surface tension, Which describes the properties of liquid and solid surfaces and interfaces? Agnes Pockles 61. When did Carl Friedrich Gauss and Wilhelm Eduard Weber invent the world's first electromagnetic telegraph? 1833 62. Why can you not see objects in a dim lit room when you come from a brightly lit room? When you move from a brightly lit room to a dimly lit one, your eyes need time to adjust as the pupils dilate to allow more light in, and the photoreceptor cells (rods) in your eyes adapt to the lower light level. This process, called dark adaptation, temporarily reduces your ability to see in the dark. 63. The given equation provides the property of the motion of an object, traversing a circular path. What is ‘v’ in this equation? ac = v^2/R ac represents the centripetal acceleration, which is the acceleration directed towards the center of the circular path that keeps the object moving in a circle. V is the linear or tangential velocity of the object, indicating how fast the object is moving along the circular path. r is the radius of the circular path, which is the distance from the center of the circle to the object moving along the perimeter. The equation describes the relationship between the centripetal acceleration, the velocity of the object, and the radius of the circle. 64. Displacement is a vector quantity that represents the shortest straight-line distance from an object's initial position to its final position, along with the direction of that line. It differs from distance because displacement only considers the net change in position, not the total path traveled. 65. Which of the following elements is highly effective for making a permanent magnet? Steel / Fe Co Ni 66. Who along with Arthur Compton received the Nobel Prize in 1927 for the development of the cloud chamber for the detection of charged particles? Charles Wilton Edwin Hubble – Expanding Universe Charles Elton - Pyramid Arthur Holmes – Continental Drift Theory’s extension 67. Which physical unit is defined as the intensity of the field which produces one newton (N) of force per ampere (A) per meter of conductor? Tesla ( Magnetic Field ) 68. Identify the sealed glass vacuum tube containing an electron beam that is focused on a phosphor-coated glass screen when light is emitted. Cathode Ray Tube 69. What is the Refractive Index of Diamond ? 2.4 70. Why the color of sky appears Blue ? Scattering 71. Which Mirror is used in Solar Blast Furnace ? Concave Convex Rear view in vehicle, ATM, railway/airport, Security purpose Concave Headlight, dentist, Shaving Mirror  Concave lens/mirror : f = negative Convex lens/mirror : f = positive Sound Speed(air) : 343 m/s ; Light Speed : 3×10^8 m/s 72. By observing motion of Objects on an Inclined plane who deduced that objects move with a constant speed when no force acts on them ? Galileo 73. In 1928 which equation was derived which combines Quantum Theory & Special Relativity ? Dirac Equation 74. When was Photoelectric Effect Discovered ? 2 Years After the formation of INC ; 1887 by Henrich Hertz 75. Convert 1kW to J/Sec? 1 kW is equal to 3600 KJ 76. What is Repeated Reflection of Sound Called ? Repeated reflection of sound is called reverberation. It occurs when sound waves reflect off surfaces such as walls, ceilings, or floors and continue to be heard after the original sound source has stopped, creating a prolonged effect. 77. Who conducted Experiment that a Glass tube filled with a low pressure gas emitted radiation when as Voltage was applied between 2 Metal Plates? Philip Lenard Electron Microscope : Ruska & Knoll Principle of Holography : Dennis Gabor Torque : rotational analogue of linear force Magnetic Flux : Wb Conservative Friction : independent of path. [Gravitation]