741. Choose the correct answer. What is the SI unit of pressure?
✅ B. Pascal
Pressure is measured in pascals. Read more
Physics – Page 38
742. 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
743. 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
744. 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
745. 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
746. 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
747. Which option correctly answers this question: what is the unit of electrical resistance?
✅ B. Ohm
Electrical resistance is measured in ohms. Read more
748. 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
749. Which option correctly answers this question: what instrument measures electric current?
✅ A. Ammeter
An ammeter measures electric current. Read more
750. Which option correctly answers this question: what is the SI unit of pressure?
✅ A. Pascal
Pressure is measured in pascals. Read more
751. 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
752. Which quantity is measured in joules — select the correct answer.
✅ C. Energy
The joule is the SI unit of energy and work. Read more
753. What is the unit of magnetic flux density — select the correct answer.
✅ D. Tesla
Magnetic flux density is measured in teslas. Read more
754. 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
755. What is the formula for kinetic energy — select the correct answer.
✅ A. ½mv²
Kinetic energy is one-half mass times velocity squared. Read more
756. Which law states that every action has an equal and opposite reaction — select the correct answer.
✅ A. Newton's third law
Newton's third law describes action and reaction forces. Read more
757. What instrument measures potential difference — select the correct answer.
✅ D. Voltmeter
A voltmeter measures potential difference. Read more
758. What is the speed of light in vacuum approximately — select the correct answer.
✅ D. 3 × 10^8 m/s
Light travels in vacuum at approximately 3 × 10^8 meters per second. Read more
759. What is the SI unit of power — select the correct answer.
✅ D. Watt
Power is measured in watts. Read more