Important 500 Questions Of Physics part-1

The “Important 500 Questions Of Physics part-1” serves as a crucial resource for students preparing for upcoming exams due to its targeted focus on key concepts. By condensing essential physics topics into a concise set of 500 questions, this resource enables students to streamline their revision process and prioritize their studying effectively.

These questions cover a wide range of topics, allowing students to thoroughly assess their understanding and identify areas for improvement. Additionally, practicing with these questions helps students familiarize themselves with the exam format and enhances their problem-solving skills, ultimately boosting their confidence and performance on exam day.

Important 500 Questions Of Physics part-1

1. What is ampere the unit of measurement – current
2. Where is the attractive force of a magnet the greatest – at both ends
3. Where is the attractive power of a magnet lowest – in the middle
4. Permanent magnets are made of – steel
5. Curie temperature of iron is – 780 degree Celsius
6. The unit of magnetic field is – Gauss
7. Temporary magnets are made of – soft iron
8. The hydraulic brakes used in automobiles are a direct application of Pascal’s principle.
9. Why does a cyclist lean while taking a turn – He leans so that the center of gravity remains inside the base, it will prevent him from falling
10. The pressure inside the soap bubble is greater than atmospheric pressure.
11. The number of protons in 92U238 is – 146
12. Propounded the principle of uncertainty – Heisenberg
13. Alpha (α) rays are – He++ ions
14. Who discovered alpha and beta rays – Rutherford
15. The reason for the feeling of weightlessness in a spacecraft in orbit is that the acceleration in orbit is equal to the acceleration due to external gravity.
16. Who had told before Newton that all objects gravitate towards the earth – Brahmagupta
17. Curie’ is the name of whose unit – Radioactive Dharmita
18. “There is no change in the position and direction of any stationary or moving object unless an external force acts on it.” This is- Newton’s first law of motion
19. What does Angstrom measure – Wavelength
20. Conservation of energy means that energy can neither be created nor destroyed.
21. Why does water boil at a temperature below 100 degrees Celsius at high altitude?- Because the atmospheric pressure decreases, hence the boiling point comes down.
22. The scientist related to buoyancy is – Archimedes
23. What is Archimedes’ law related to – Law of flotation
24. What is the unit of power of lens in SI system – Diopter
25. The work done to hold a weight of 20 kg at a height of 1 meter above the ground is – zero joule.
26. “For every action there is an equal and opposite reaction.” This is – Newton’s third law of motion
27. An astronaut can jump higher on the lunar surface than on the Earth’s surface because – The force of gravity on the lunar surface is much less than on the Earth’s surface.
28. A ball is dropped from a tall building with a uniform acceleration of 8 m/s2. What will be its velocity after 3 seconds – 29.4 m/s
29. The mass of a particle is m and momentum is p. Its kinetic energy will be – P2/2 m
30. In a capillary tube a liquid rises to a higher height than water, the reason for this is that the surface tension of the liquid is higher than that of water.
31. For a heavy boat floating in a lake, the weight of water displaced by the boat is equal to the part of the boat that is below the surface of the lake water.
32. An Earth satellite moves continuously in its orbit? This happens due to the effect of centrifugal force, which is obtained from the gravity exerted by the Earth on the satellite.
33. The apparent weight of a person in an elevator is less than the actual weight when the elevator is going down with acceleration
34. The mass of an object is 100 kg (gravitational ge = 10ms-1) If the acceleration due to gravity on the Moon is ge/6 then the mass of the object in the Moon will be – 100 kg.
35. If a man pushes a wall, but fails to displace it, he does – No work
36. A person is at rest in the middle of a horizontal plane of perfectly smooth ice. By using which law/s of Newton can he bring himself to the shore – Third law of motion
37. If a carpet is beaten with a stick to clean it, then which law applies – First law of motion
38. The weight of a body is greatest at the poles.
39. What is called that property of a body by which it resists any change in the state of rest or uniform motion in a straight line – Inertia
40. There is a difference between the mass and weight of an object because – mass remains constant, while weight is variable.
41. When does a person sitting in an elevator feel that his weight is greater – When the elevator is going up at a fast speed
42. If the length of a simple pendulum is increased by 4%, its time period will increase by – 2%.
43. Candela is the unit of light intensity
44. When a cyclist turns a turn, he leans inwards.
45. What will be the dimension of the ratio of angular momentum and linear momentum – M0L1T0
46. Which law validates the statement that matter can neither be created nor destroyed – Law of Conservation of Energy
47. What is the height of geostationary satellites – 36,000 Km
48. What is measured in cusecs – flow of water
49. Due to which fat can be separated from milk in cream separator – Centrifugal force
50. In which unit can we measure food energy – Calories
51. Who propounded the universal law of gravitation – Newton
52. Energy stored in the clock spring – Potential energy
53. What is the measure of inertia – mass
54. When a stone is brought from the surface of the Moon to the Earth, then – Its weight will change, but not the mass.
55. When a boat enters the sea from a river, it rises slightly upward.
56. When a person lands on the moon, the weight present in his body decreases and the volume remains unchanged.
57. When detergent is added to pure water, surface tension decreases.
58. When we sit on a seat with a rubber mattress or lie down on the mattress, its shape changes. Potential energy is found in such a substance.
59. What will be the change in the volume of water if the temperature is dropped from 9⁰C to 3⁰C – The volume will first decrease and then increase.
60. The reason why a piece of iron does not float on the surface of water – the density of iron is more than the density of water
61. Swimming in water is possible due to which Newton’s law of motion – Third Law
62. What is decibel used to measure – sound in the environment
63. Synchronous satellite rotates around the earth from west to east.
64. Why does a swimmer find it easier to swim in sea water than in river- The density of sea water is higher than that of ordinary water.
65. Which is the correct formula to find acceleration – change in velocity / change in time.
66. A person trapped in a swamp is advised to lie down, because – due to large area, the pressure reduces.
67. The unit of pressure is – Pascal