Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 616 · 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.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
2. 2.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) so all go off together (c) to save copper only (d) to make bulbs dim
3. 3.✏️ In a circuit diagram, which part is drawn as a dot where wires meet? (a) wire (b) ammeter (c) LED (d) junction
4. 4.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
5. 5.🔍 Which is the odd one out? (a) climb an electric pole (b) use mains for a project (c) poke things in a socket (d) build with an adult near
6. 6.🔍 Which is the odd one out? (a) take cells out after use (b) fly kites in open fields (c) stay away from pylons (d) touch a fallen wire
7. 7.True or false: “a single current path” is true of a series circuit. (a) False (b) True
8. 8.🔁 What must there be for a current to flow? (a) a plastic gap (b) a complete loop (c) one loose end (d) a broken path
9. 9.🔋 5 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)? =
10. 10.✏️ In a circuit diagram, which part is drawn as two equal parallel lines? (a) capacitor (b) cell (c) junction (d) switch
11. 11.🔋 How many volts does one ordinary torch cell give? (a) 1.5 V (b) 15 V (c) 0.5 V (d) 230 V
12. 12.True or false: if a cell is taken out, the circuit is closed and current flows. (a) True (b) False
13. 13.💡 A battery lights 3 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
14. 14.⚠️ Which power source should children use for electronics projects? (a) a mains extension board (b) a small battery pack (c) an inverter socket (d) a wall socket
15. 15.True or false: a plain rectangle is the symbol for a resistor. (a) True (b) False
16. 16.💡 In a series circuit, how many paths does the current have? (a) two (b) one for each bulb (c) none (d) one
17. 17.True or false: a toggle switch flips up or down. (a) True (b) False
18. 18.True or false: if the switch is ON, the circuit is closed and current flows. (a) True (b) False
19. 19.True or false: to keep drinks far away is safe. (a) True (b) False
20. 20.✏️ In a circuit diagram, which part is drawn as a line lifted at a gap? (a) cell (b) bulb (c) wire (d) switch
21. 21.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel spoon across the gap. Does the bulb glow? (a) No (b) Yes
22. 22.Which of these mainly gives out light? (a) an electric toy car (b) a night lamp (c) a buzzer (d) a school bell
23. 23.🔋 Identical cells side by side (in parallel) give … (a) the same voltage (b) double the voltage (c) no voltage (d) half the voltage
24. 24.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they keep glowing (b) they explode (c) they get dimmer (d) they all go out
25. 25.🔘 What does a switch do in a circuit? (a) makes electricity (b) stores current (c) opens or closes the loop (d) changes the voltage
26. 26.Which of these is safe? (a) poke things in a socket (b) throw cells in a fire (c) touch a fallen wire (d) keep drinks far away
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 steel coin. Does the bulb glow? (a) Yes (b) No
28. 28.🔋 What should you do with used-up cells? (a) throw them in a fire (b) give them for recycling (c) bury them in soil (d) cut them open
29. 29.True or false: on a cell, “the flat end” means the − (negative) end. (a) False (b) True
30. 30.🔘 A bulb and a cell are joined through 5 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
31. 31.⚠️ Is it safe to touch a fallen wire? (a) not safe (b) safe
32. 32.Which drawing is the symbol for a switch? (a) a line lifted at a gap (b) triangle against a bar (c) a plain rectangle (d) triangle, bar and arrows
33. 33.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
34. 34.🔋 Does a cell give electricity or use electricity? (a) gives electricity (b) uses electricity
35. 35.True or false: to fly kites in open fields is safe. (a) True (b) False
36. 36.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
37. 37.Which drawing is the symbol for a motor? (a) a circle with M inside (b) a circle with A inside (c) a small empty box (d) two equal parallel lines
38. 38.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) never (b) when either is ON (c) only when both are OFF (d) only when both are ON
39. 39.Which drawing is the symbol for an LED? (a) a circle with M inside (b) triangle against a bar (c) a circle with V inside (d) triangle, bar and arrows
40. 40.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes

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