Electric circuits magnetism light reflection refraction and lenses. - Question Bank
1. In a parallel circuit, if one branch is open, the current will:
2. A device that converts electrical energy into light energy is a:
3. Which phenomenon is responsible for the formation of a rainbow?
4. The process by which a neutral object becomes electrically charged is called:
5. What is the direction of the magnetic field lines around a bar magnet?
6. The SI unit of electric power is:
7. The ability of a material to resist the flow of electric current is called:
8. What type of mirror is used as a rearview mirror in vehicles?
9. The phenomenon of light from a source spreading out after passing through a narrow slit is called:
10. What is the device used to detect the presence and direction of electric current in a circuit?
11. The force experienced by a current-carrying conductor placed in a magnetic field is given by:
12. What is the magnetic field inside a long, straight solenoid approximately:
13. If the resistance in a circuit is doubled, and the voltage remains constant, the current will:
14. Which of the following is an insulator?
15. What is the unit of power of a lens?
16. When light travels from a rarer medium to a denser medium, it bends:
17. A convex lens is also known as a(n):
18. The phenomenon of light scattering by particles in the atmosphere causing the blue color of the sky is an example of:
19. Electromagnets are typically made using:
20. Which law describes the direction of the induced current in a conductor moving in a magnetic field?
21. The SI unit of magnetic flux is:
22. What is the potential difference across a resistor of 10 ohms carrying a current of 2 amperes?
23. Which of the following materials is a good conductor of electricity?
24. What is the power of a lens with a focal length of -2 meters?
25. The refractive index of a medium is defined as the ratio of the speed of light in vacuum to the:
26. Which of the following is a characteristic of the image formed by a convex mirror?
27. The image formed by a plane mirror is always:
28. What is the phenomenon of splitting of white light into its constituent colors called?
29. The direction of the magnetic field produced by a current-carrying solenoid is determined by:
30. A device that converts mechanical energy into electrical energy using the principle of electromagnetic induction is a:
31. The magnetic field lines around a straight current-carrying wire are:
32. In a parallel circuit, the voltage across each component is:
33. What happens to the total resistance in a series circuit when another resistor is added?
34. A circuit where the components are connected end-to-end in a single path is called a(n):
35. The SI unit of electrical resistance is:
36. Which color of visible light has the shortest wavelength?
37. What causes dispersion of white light into its constituent colors when it passes through a prism?
38. The focal length of a lens is the distance between:
39. A concave lens always forms an image that is:
40. Which type of lens is thicker at the center and thinner at the edges, and converges parallel rays of light?
41. What is the phenomenon where light bounces off a surface?
42. The law that describes the relationship between the angle of incidence, angle of refraction, and the refractive indices of the two media is:
43. What is the bending of light as it passes from one medium to another called?
44. Which type of magnet retains its magnetism for a long time and is difficult to demagnetize?
45. The phenomenon of inducing an electromotive force (EMF) in a circuit due to a change in magnetic flux is called:
46. What is the SI unit of magnetic field strength?
47. A device that converts electrical energy into mechanical energy is known as:
48. What is the opposition to the flow of electric current called?
49. Which law states that the current through a conductor between two points is directly proportional to the voltage across the two points and inversely proportional to the resistance between them?
50. What is the unit of electric current?