Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 422 · 40 questions

Remember (Find the topic, use the idea): Find the topic: energy, safety, conductor, closed loop, switches, cells, symbols, series or parallel. Use that lesson’s idea — complete loop, all ON for series, cells add up, one path or many. For sums, write the working and check it again.

1. 1.⚠️ Is it safe to touch a fallen wire? (a) not safe (b) safe
2. 2.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) switch (b) motor (c) cell (d) voltmeter
3. 3.🔋 6 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
4. 4.Which of these is true of a series circuit? (a) own switch for each bulb (b) used in house wiring (c) bulbs share the voltage (d) one out, the rest glow
5. 5.💡 2 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
6. 6.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. A gap in one wire is bridged by a plastic ruler. Does the bulb glow? (a) Yes (b) No
7. 7.Which of these is safe? (a) touch a switch when wet (b) take cells out after use (c) open a phone charger (d) fly a kite near wires
8. 8.🔁 Is the circuit closed or open if a wire has come loose? (a) open (b) closed
9. 9.Which of these is an insulator? (a) a copper wire (b) a metal paper clip (c) a safety pin (d) a plastic ruler
10. 10.💡 In a series circuit, how many paths does the current have? (a) two (b) one (c) none (d) one for each bulb
11. 11.True or false: a slide switch slides side to side. (a) True (b) False
12. 12.True or false: to poke things in a socket is safe. (a) False (b) True
13. 13.⚠️ Who should be with you when you build a circuit? (a) a stranger online (b) a trusted adult (c) nobody (d) a younger child
14. 14.🔘 When a switch is ON, the circuit is … (a) broken (b) closed (c) open (d) cut
15. 15.⚠️ Is it safe to throw cells in a fire? (a) not safe (b) safe
16. 16.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) resistor (b) wire (c) switch (d) cell
17. 17.True or false: to touch a fallen wire is safe. (a) True (b) False
18. 18.Which of these is a conductor? (a) a woollen thread (b) aluminium foil (c) a dry cork (d) a wooden stick
19. 19.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) both of them (b) it does not matter (c) only one (d) none
20. 20.Which of these means the circuit is open? (a) a cell is taken out (b) the switch is ON (c) all wires are joined (d) the loop is complete
21. 21.🔋 What is a battery? (a) a kind of bulb (b) a switch with a lid (c) two or more cells joined (d) one single wire
22. 22.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) in parallel (c) not joined (d) in series
23. 23.True or false: to use mains for a project is safe. (a) False (b) True
24. 24.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
25. 25.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True
26. 26.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) pull them by the hand (b) wait and watch (c) pour water on them (d) shout for an adult
27. 27.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a rubber eraser. Does the bulb glow? (a) No (b) Yes
28. 28.💡 5 identical bulbs are in parallel and each bulb has its own switch on its path. 3 of the switches are OFF and the rest are ON. How many bulbs glow?
29. 29.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) True (b) False
30. 30.🔋 A 9 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
31. 31.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 4 is taken out of its holder. How many bulbs glow?
32. 32.🔋 8 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
33. 33.True or false: a graphite rod is an insulator. (a) True (b) False
34. 34.💡 6 identical bulbs are in parallel and each bulb has its own switch on its path. 3 of the switches are OFF and the rest are ON. How many bulbs glow?
35. 35.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
36. 36.True or false: a tube light mainly gives out light. (a) False (b) True
37. 37.🔌 Is a plastic ruler a conductor or an insulator? (a) a conductor (b) an insulator
38. 38.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
39. 39.🔌 Is a glass marble a conductor or an insulator? (a) a conductor (b) an insulator
40. 40.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are ON (b) when either is ON (c) only when both are OFF (d) never

Free electronics lessons, practice and worksheets at talentjr.in/electronics-for-kids