41. Choose the correct answer. What is the unit of magnetic flux density?
✅ D. Tesla
Magnetic flux density is measured in teslas. Read more
Physics – Page 3
42. Choose the correct answer. Which form of energy is stored in a stretched spring?
✅ C. Elastic potential energy
A stretched spring stores elastic potential energy. Read more
43. Choose the correct answer. What is the formula for kinetic energy?
✅ A. ½mv²
Kinetic energy is one-half mass times velocity squared. Read more
44. Choose the correct answer. Which law states that every action has an equal and opposite reaction?
✅ A. Newton's third law
Newton's third law describes action and reaction forces. Read more
45. Choose the correct answer. What instrument measures potential difference?
✅ C. Voltmeter
A voltmeter measures potential difference. Read more
46. Choose the correct answer. What is the SI unit of pressure?
✅ B. Pascal
Pressure is measured in pascals. Read more
47. Which option correctly answers this question: what happens to the resistance of a metallic conductor generally when temperature increases?
✅ B. It increases
For typical metals, electrical resistance increases as temperature rises. Read more
48. Which option correctly answers this question: which quantity is measured in joules?
✅ A. Energy
The joule is the SI unit of energy and work. Read more
49. Which option correctly answers this question: which phenomenon is the bouncing back of light from a surface?
✅ D. Reflection
Reflection is the return of light from a surface. Read more
50. Which option correctly answers this question: what is the unit of magnetic flux density?
✅ C. Tesla
Magnetic flux density is measured in teslas. Read more
51. Which option correctly answers this question: what type of lens is thicker in the middle than at the edges?
✅ B. Convex lens
A convex lens is thicker at the center and converges parallel light rays. Read more
52. Which option correctly answers this question: what is the unit of electrical resistance?
✅ B. Ohm
Electrical resistance is measured in ohms. Read more
53. Which option correctly answers this question: what is the acceleration due to gravity near Earth’s surface approximately?
✅ A. 9.8 m/s²
Near Earth's surface, gravitational acceleration is approximately 9.8 m/s². Read more
54. Which option correctly answers this question: what instrument measures electric current?
✅ A. Ammeter
An ammeter measures electric current. Read more
55. Which option correctly answers this question: what is the SI unit of pressure?
✅ A. Pascal
Pressure is measured in pascals. Read more
56. What happens to the resistance of a metallic conductor generally when temperature increases — select the correct answer.
✅ D. It increases
For typical metals, electrical resistance increases as temperature rises. Read more
57. Which quantity is measured in joules — select the correct answer.
✅ C. Energy
The joule is the SI unit of energy and work. Read more
58. What is the unit of magnetic flux density — select the correct answer.
✅ D. Tesla
Magnetic flux density is measured in teslas. Read more
59. Which form of energy is stored in a stretched spring — select the correct answer.
✅ B. Elastic potential energy
A stretched spring stores elastic potential energy. Read more
60. What is the formula for kinetic energy — select the correct answer.
✅ A. ½mv²
Kinetic energy is one-half mass times velocity squared. Read more