Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 131 · 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.⚠️ Which power source should children use for electronics projects? (a) a wall socket (b) an inverter socket (c) a mains extension board (d) a small battery pack
2. 2.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
3. 3.Which of these mainly gives out light? (a) a tube light (b) a loudspeaker (c) a toaster (d) a rice cooker
4. 4.💡 A battery lights 4 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
5. 5.🔌 A gap of dry air between two wires acts as … (a) an insulator (b) a conductor (c) a cell (d) a switch that is ON
6. 6.Which of these is safe? (a) touch a fallen wire (b) use a cable with cuts (c) open a phone charger (d) use small battery cells
7. 7.Which drawing is the symbol for a diode? (a) triangle against a bar (b) a long and a short line (c) a small empty box (d) a circle with an X in it
8. 8.🔋 7 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)? =
9. 9.🔍 Which is the odd one out? (a) dry your hands first (b) stay away from pylons (c) use mains for a project (d) stop if a part gets hot
10. 10.🔗 Series or parallel circuit: “many paths for current”? (a) series (b) parallel
11. 11.🔌 Which metal is used for most electric wires at home? (a) plastic (b) copper (c) rubber (d) glass
12. 12.⚠️ Is it safe to touch a fallen wire? (a) safe (b) not safe
13. 13.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. Does bulb 2 glow? (a) Yes (b) No
14. 14.🔦 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 paper strip. Does the bulb glow? (a) No (b) Yes
15. 15.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) only one (b) it does not matter (c) none (d) both of them
16. 16.Which of these is not safe? (a) use a cable with cuts (b) build with an adult near (c) stop if a part gets hot (d) dry your hands first
17. 17.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) False (b) True
18. 18.Which of these uses electricity? (a) a solar panel (b) a water pump (c) a wind turbine (d) a battery
19. 19.⚠️ Is it safe to use a cable with cuts? (a) safe (b) not safe
20. 20.🔘 Which kind of switch flips up or down? (a) a reed switch (b) a toggle switch (c) a push button (d) a tilt switch
21. 21.💡 2 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
22. 22.Which drawing is the symbol for a motor? (a) a circle with A inside (b) many long-short pairs (c) a circle with an X in it (d) a circle with M inside
23. 23.🔁 What do we call a circuit with a break in it? (a) a closed circuit (b) a series circuit (c) a full circuit (d) an open circuit
24. 24.True or false: if a cell is taken out, the circuit is closed and current flows. (a) True (b) False
25. 25.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) an open circuit (b) a parallel circuit (c) a short circuit (d) a safe circuit
26. 26.💡 3 identical bulbs are in parallel and each bulb has its own switch on its path. 1 of the switches is OFF and the rest are ON. How many bulbs glow?
27. 27.Which of these is an insulator? (a) a rubber eraser (b) a steel spoon (c) a graphite rod (d) a brass key
28. 28.✏️ In a circuit diagram, which part is drawn as triangle, bar and arrows? (a) switch (b) battery (c) diode (d) LED
29. 29.🔌 Is a steel spoon a conductor or an insulator? (a) an insulator (b) a conductor
30. 30.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
31. 31.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a paper strip across the gap. Does the bulb glow? (a) Yes (b) No
32. 32.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) movement energy (b) sound energy (c) chemical energy (d) light energy
33. 33.💡 2 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. Does bulb 1 glow? (a) Yes (b) No
34. 34.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
35. 35.🔋 A 6 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
36. 36.Which drawing is the symbol for a battery? (a) many long-short pairs (b) a plain rectangle (c) two equal parallel lines (d) a straight line
37. 37.True or false: a copper wire is a conductor. (a) True (b) False
38. 38.Which of these mainly gives out light? (a) a night lamp (b) a mixer grinder (c) an electric toy car (d) an electric iron
39. 39.True or false: a rice cooker mainly makes sound. (a) False (b) True
40. 40.⚠️ Is it safe to use small battery cells? (a) not safe (b) safe

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