Global MCQ Practice

🌐 Total MCQ
🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books

Class 7 Science Chapter 10 Electric Current And Its Effects Quiz 10 (60 MCQs)

Quiz Instructions

Select an option to see the correct answer instantly.

1. Iron objects can be protected by electroplating them with
2. Flow of electron is called
3. What does the word "circumpolar" mean?
4. Where can the key and the switch can be placed in the circuit?
5. The amount of heat in a wire depends on
6. Chromium plating is done on many objects such as car parts, bar taps, kitchen gas stoves etc. Why?
7. An electric bell works on the ..... effect of electric current.
8. The magnetic field inside a long straight solenoid carrying current is:
9. Tin cans used for storing food are made by electroplating
10. In which of these is current not conducted by electrons?
11. Which of the following is not a conductor of electricity?
12. In an electrolyte, the current is due to the flow of
13. What symbol do we use for charge?
14. The North pole of a long bar magnet was pushed slowly into a short solenoid connected to a galvanometer. The magnet was held stationary for a few seconds with the North pole in the middle of the solenoid and then withdrawn rapidly. The maximum deflection of the galvanometer was observed when the magnet was:
15. Neutrons have a ..... charge.
16. The SI unit of electric potential is
17. A straight wire of length 0.5m and carrying current 1.2A is placed in uniform magnetic field of induction 2T, applied perpendicular to the length of the wire. The force on the wire is
18. The process of breaking up of an electrolyte chemically by passing an electric current is called
19. For electric current to flow, do you need a closed or open circuit?
20. Electric fuse, when gets heated too much, breaks
21. An electromagnet does not attract a piece of iron
22. How is electric potential measured
23. Why is it important to use a salt bridge in an electrolytic cell?
24. THERE ARE 2 WIRES CALLED LEADS ATTACHED TO THE LED.One lead is slightly longer than the other.
25. Surrounding every magnet is a ..... .....
26. Most liquids that conduct electricity are solution of acids, bases and distilled water
27. Who developed the ISI mark?
28. Which of the given statements is true for a switch?
29. When an electric current is passed through a conducting solution, there is a change of colour of the solution. This indicates
30. Which of the following is not used for electroplating metal articles?
31. Explain the process of electrolysis.
32. When we connect a fused bulb to a working cell this circuit is
33. When magnesium ribbon burnt it produce
34. Choose the statement which is not correct in the case of an electric fuse.
35. The bulb which does not glow is said to be
36. We can also detect weak electric current flowing through a liquid by using a
37. The circulation of hot and cold fluids (liquids and gases)
38. What happens during the process of erosion?
39. When a cracker is ignited, a sudden reaction takes place with the evolution of heat, light and sound. Identify the type of combustion?
40. When Bethany walks across a carpet, her socks pick up many electric charges. Later in the day, these charges are no longer present on her socks. What most likely happened to the charges?
41. Electroplating is based on
42. Nichrome Wire Is Used In:
43. Every working circuit has at least three parts:1) a power source, 2) a conductor, usually wire and 3)
44. Which word best fits this definition:the contacts between the armature and the source of power in a motor.
45. Heating effect is used in
46. What is the SI unit of electric current?
47. The direction of force on a current carrying conductor is given by:
48. Electric fuse breaks when
49. Bicycle bells and wheel rims are electroplated with which metal?
50. The negatively charged electrode is called the .....
51. Why the magnetic field lines never intersect.
52. Ken wanted to make a light bulb glow. Which set of materials would he need?
53. What are the 2 effects of electricity?
54. The movement of electrically charged ..... is called electric .....
55. Does friction cause heat?
56. Electrical current DOES NOT flow in
57. How many terminals do each cell have?
58. What unit do we measure time in?
59. A current-carrying wire of length 50 cm ispositioned perpendicular to a uniform magnetic field.If the current is 10.0 A and it is determined that thereis a resultant force of 3.0 N on the wire due to theinteraction of the current and field, what is themagnetic field strength?
60. One Coulomb charge is equivalent to the charge contained in
🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books