Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 770 · 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.🔦 A circuit has a used-up (dead) cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
2. 2.🔋 Identical cells side by side (in parallel) give … (a) no voltage (b) double the voltage (c) the same voltage (d) half the voltage
3. 3.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) parallel (b) series
4. 4.💡 Why is house wiring done in parallel? (a) to save copper only (b) each gets full voltage (c) so all go off together (d) to make bulbs dim
5. 5.True or false: a small empty box is the symbol for a resistor. (a) True (b) False
6. 6.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
7. 7.True or false: on a cell, “the flat end” means the − (negative) end. (a) False (b) True
8. 8.Which of these uses electricity? (a) a generator (b) a bicycle dynamo (c) a cell (d) a mobile phone
9. 9.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a wooden stick across the gap. Does the bulb glow? (a) Yes (b) No
10. 10.True or false: if a wire has come loose, the circuit is closed and current flows. (a) True (b) False
11. 11.✏️ Why do engineers draw circuits with symbols? (a) to make it colourful (b) to hide the circuit (c) quick and clear for all (d) symbols are heavier
12. 12.Which of these is safe? (a) fly a kite near wires (b) touch a switch when wet (c) use mains for a project (d) dry your hands first
13. 13.True or false: to take cells out after use is safe. (a) False (b) True
14. 14.⚡ What does an electric iron mainly change electricity into? (a) movement (b) light (c) heat (d) sound
15. 15.What does a toggle switch do? (a) springs back when let go (b) closes near a magnet (c) works only while pressed (d) flips up or down
16. 16.Which drawing is the symbol for a junction? (a) two or more cell symbols (b) a dot where wires meet (c) one tall, one short bar (d) a line lifted at a gap
17. 17.🔌 Which metal is used for most electric wires at home? (a) plastic (b) rubber (c) copper (d) glass
18. 18.What does a toggle switch do? (a) springs back when let go (b) stays where you flip it (c) closes near a magnet (d) works only while pressed
19. 19.💡 A battery lights 2 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
20. 20.🔌 Is a rubber band a conductor or an insulator? (a) a conductor (b) an insulator
21. 21.🔘 Which kind of switch slides side to side? (a) a tilt switch (b) a toggle switch (c) a slide switch (d) a push button
22. 22.Which of these is not safe? (a) use a cable with cuts (b) keep drinks far away (c) take cells out after use (d) stay away from pylons
23. 23.Which of these is safe? (a) climb an electric pole (b) use mains for a project (c) touch a switch when wet (d) stay away from pylons
24. 24.🔦 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
25. 25.💡 3 identical bulbs are joined in series with a 3 V battery (ideal wires). How many volts does each bulb get? =
26. 26.🔦 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) No (b) Yes
27. 27.⚠️ Is it safe to dry your hands first? (a) not safe (b) safe
28. 28.🔘 When a switch is ON, the circuit is … (a) cut (b) closed (c) open (d) broken
29. 29.Which of these is true of a series circuit? (a) each gets the full volts (b) many paths for current (c) used in house wiring (d) a single current path
30. 30.🔦 A circuit has a used-up (dead) 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 glass marble. Does the bulb glow? (a) Yes (b) No
31. 31.True or false: if all wires are joined, the circuit is closed and current flows. (a) False (b) True
32. 32.🔍 Which is the odd one out? (a) an electric iron (b) a school bell (c) a rice cooker (d) a room heater
33. 33.🔋 A 6 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
34. 34.⚠️ Why must we never touch switches with wet hands? (a) water makes it cold (b) water carries current (c) it spoils the paint (d) it is just untidy
35. 35.True or false: if the loop is complete, the circuit is open and no current flows. (a) False (b) True
36. 36.⚡ What does a siren mainly change electricity into? (a) heat (b) movement (c) light (d) sound
37. 37.True or false: a push button springs back when let go. (a) False (b) True
38. 38.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a woollen thread across the gap. Does the bulb glow? (a) Yes (b) No
39. 39.🔁 Is the circuit closed or open if the loop is complete? (a) closed (b) open
40. 40.🔗 Series or parallel circuit: “many paths for current”? (a) parallel (b) series

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