Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 480 · 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.💡 3 identical bulbs are joined in series with a 3 V battery (ideal wires). How many volts does each bulb get? =
2. 2.💡 6 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
3. 3.Which drawing is the symbol for a bulb? (a) a circle with A inside (b) many long-short pairs (c) a circle with a cross (d) a circle with V inside
4. 4.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a rubber band. Does the bulb glow? (a) No (b) Yes
5. 5.⚡ What does a water heater mainly change electricity into? (a) heat (b) sound (c) light (d) movement
6. 6.🔋 Does a generator give electricity or use electricity? (a) uses electricity (b) gives electricity
7. 7.True or false: a slide switch slides side to side. (a) True (b) False
8. 8.🔋 6 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
9. 9.🔌 Is a rubber eraser a conductor or an insulator? (a) an insulator (b) a conductor
10. 10.True or false: if a wire is cut, the circuit is closed and current flows. (a) False (b) True
11. 11.💡 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
12. 12.True or false: if all wires are joined, the circuit is closed and current flows. (a) False (b) True
13. 13.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) chemical energy (b) sound energy (c) light energy (d) movement energy
14. 14.🔋 Does a bicycle dynamo give electricity or use electricity? (a) uses electricity (b) gives electricity
15. 15.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is ON and B is ON. Does the bulb glow? (a) No (b) Yes
16. 16.⚡ A fan changes electrical energy mainly into which kind of energy? (a) chemical energy (b) sound energy (c) light energy (d) movement energy
17. 17.Which of these is true of a series circuit? (a) used in house wiring (b) many paths for current (c) bulbs share the voltage (d) one out, the rest glow
18. 18.True or false: to dry your hands first is not safe. (a) True (b) False
19. 19.True or false: if the switch is OFF, the circuit is open and no current flows. (a) True (b) False
20. 20.True or false: on a cell, “the flat end” means the + (positive) end. (a) True (b) False
21. 21.🔋 5 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
22. 22.Which of these is an insulator? (a) a glass marble (b) a copper wire (c) an iron nail (d) a safety pin
23. 23.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they keep glowing (c) they explode (d) they all go out
24. 24.True or false: a toaster mainly gives out light. (a) False (b) True
25. 25.🔌 Which metal is used for most electric wires at home? (a) rubber (b) glass (c) copper (d) plastic
26. 26.True or false: if a cell is taken out, the circuit is closed and current flows. (a) False (b) True
27. 27.True or false: a ceramic cup is an insulator. (a) False (b) True
28. 28.⚡ What does a mixer grinder mainly change electricity into? (a) light (b) heat (c) sound (d) movement
29. 29.🔍 Which is the odd one out? (a) aluminium foil (b) a brass key (c) a steel spoon (d) a glass marble
30. 30.True or false: if the loop is complete, the circuit is closed and current flows. (a) True (b) False
31. 31.🔋 How many 1.5 V cells must be joined in series to give 7.5 V?
32. 32.Which of these gives us electricity? (a) an air conditioner (b) a refrigerator (c) a water pump (d) a solar panel
33. 33.🔋 A 12 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
34. 34.⚡ What does an electric iron mainly change electricity into? (a) light (b) sound (c) movement (d) heat
35. 35.True or false: to build with an adult near is safe. (a) True (b) False
36. 36.Which of these is not safe? (a) use small battery cells (b) dry your hands first (c) stay away from pylons (d) touch a switch when wet
37. 37.Which drawing is the symbol for a bulb? (a) triangle against a bar (b) a circle with an X in it (c) a dot where wires meet (d) two or more cell symbols
38. 38.⚠️ Is it safe to climb an electric pole? (a) safe (b) not safe
39. 39.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
40. 40.⚡ What does a street light mainly change electricity into? (a) movement (b) heat (c) light (d) sound

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