721. Select the best answer: What is the unit of electrical resistance?
✅ D. Ohm
Electrical resistance is measured in ohms. Read more
Physics – Page 37
722. Select the best answer: What is the acceleration due to gravity near Earth’s surface approximately?
✅ D. 9.8 m/s²
Near Earth's surface, gravitational acceleration is approximately 9.8 m/s². Read more
723. Select the best answer: What instrument measures electric current?
✅ A. Ammeter
An ammeter measures electric current. Read more
724. Select the best answer: What is the SI unit of pressure?
✅ D. Pascal
Pressure is measured in pascals. Read more
725. Which of the following is correct? What happens to the resistance of a metallic conductor generally when temperature increases?
✅ C. It increases
For typical metals, electrical resistance increases as temperature rises. Read more
726. Which of the following is correct? Which quantity is measured in joules?
✅ C. Energy
The joule is the SI unit of energy and work. Read more
727. Which of the following is correct? Which phenomenon is the bouncing back of light from a surface?
✅ D. Reflection
Reflection is the return of light from a surface. Read more
728. Which of the following is correct? What is the unit of magnetic flux density?
✅ C. Tesla
Magnetic flux density is measured in teslas. Read more
729. Which of the following is correct? What type of lens is thicker in the middle than at the edges?
✅ A. Convex lens
A convex lens is thicker at the center and converges parallel light rays. Read more
730. Which of the following is correct? Which law states that every action has an equal and opposite reaction?
✅ B. Newton's third law
Newton's third law describes action and reaction forces. Read more
731. Which of the following is correct? What instrument measures potential difference?
✅ C. Voltmeter
A voltmeter measures potential difference. Read more
732. Which of the following is correct? What is the speed of light in vacuum approximately?
✅ D. 3 × 10^8 m/s
Light travels in vacuum at approximately 3 × 10^8 meters per second. Read more
733. Choose the correct answer. 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
734. Choose the correct answer. Which quantity is measured in joules?
✅ A. Energy
The joule is the SI unit of energy and work. Read more
735. Choose the correct answer. Which phenomenon is the bouncing back of light from a surface?
✅ C. Reflection
Reflection is the return of light from a surface. Read more
736. Choose the correct answer. What is the unit of magnetic flux density?
✅ D. Tesla
Magnetic flux density is measured in teslas. Read more
737. 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
738. Choose the correct answer. What is the formula for kinetic energy?
✅ A. ½mv²
Kinetic energy is one-half mass times velocity squared. Read more
739. 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
740. Choose the correct answer. What instrument measures potential difference?
✅ C. Voltmeter
A voltmeter measures potential difference. Read more