Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 228 · 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 drawing is the symbol for an LED? (a) a small empty box (b) two equal parallel lines (c) triangle, bar and arrows (d) one tall, one short bar
2. 2.True or false: a paper strip is an insulator. (a) False (b) True
3. 3.💡 6 identical bulbs are joined in parallel (each on its own side-by-side path) with a battery and a closed switch on the main wire. Bulbs 1 and 2 are taken out of their holders. Does bulb 6 glow? (a) No (b) Yes
4. 4.Which of these is not safe? (a) touch a switch when wet (b) use small battery cells (c) keep drinks far away (d) build with an adult near
5. 5.⚠️ Is it safe to use mains for a project? (a) not safe (b) safe
6. 6.💡 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) the same (c) dimmer
7. 7.True or false: triangle against a bar is the symbol for a junction. (a) True (b) False
8. 8.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) one bulb out, all go out (c) a single current path (d) used in house wiring
9. 9.🔘 Two switches are in series. When does the bulb glow? (a) never (b) when either is ON (c) when both are ON (d) when both are OFF
10. 10.🔘 Which kind of switch slides side to side? (a) a push button (b) a slide switch (c) a reed switch (d) a tilt switch
11. 11.💡 4 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
12. 12.💡 5 identical bulbs are joined in parallel (each on its own side-by-side path) with a battery and a closed switch on the main wire. Bulbs 3 and 4 are taken out of their holders. Does bulb 2 glow? (a) Yes (b) No
13. 13.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
14. 14.⚡ What does a water heater mainly change electricity into? (a) light (b) sound (c) movement (d) heat
15. 15.True or false: if the loop is complete, the circuit is closed and current flows. (a) False (b) True
16. 16.🔁 Is the circuit closed or open if the switch is OFF? (a) open (b) closed
17. 17.⚠️ Is it safe to build with an adult near? (a) safe (b) not safe
18. 18.What does a slide switch do? (a) closes near a magnet (b) slides side to side (c) stays where you flip it (d) springs back when let go
19. 19.Which of these means the circuit is closed? (a) a wire is cut (b) the loop is complete (c) a wire has come loose (d) the bulb is unscrewed
20. 20.🔌 Is a copper wire a conductor or an insulator? (a) an insulator (b) a conductor
21. 21.🔗 Series or parallel circuit: “used in house wiring”? (a) series (b) parallel
22. 22.🔍 Which is the odd one out? (a) stop if a part gets hot (b) fly kites in open fields (c) use small battery cells (d) use mains for a project
23. 23.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
24. 24.🔘 When a switch is ON, the circuit is … (a) open (b) cut (c) closed (d) broken
25. 25.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. A gap in one wire is bridged by a graphite rod. Does the bulb glow? (a) Yes (b) No
26. 26.💡 5 identical bulbs are joined in parallel (each on its own side-by-side path) with a battery and a closed switch on the main wire. Bulbs 3 and 5 are taken out of their holders. How many bulbs glow?
27. 27.🔘 What does a switch do in a circuit? (a) stores current (b) opens or closes the loop (c) changes the voltage (d) makes electricity
28. 28.💡 In a series circuit, how many paths does the current have? (a) none (b) one for each bulb (c) one (d) two
29. 29.🔌 Why are electric wires covered in plastic? (a) plastic is a conductor (b) plastic makes current (c) to make them heavy (d) plastic is an insulator
30. 30.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is ON, B is OFF, C is OFF and D is ON. Does the bulb glow? (a) No (b) Yes
31. 31.🔋 What should you do with used-up cells? (a) give them for recycling (b) cut them open (c) throw them in a fire (d) bury them in soil
32. 32.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) parallel (b) series
33. 33.Which of these uses electricity? (a) a solar panel (b) a refrigerator (c) a bicycle dynamo (d) a generator
34. 34.True or false: to build with an adult near is safe. (a) False (b) True
35. 35.Which of these means the circuit is open? (a) all wires are joined (b) a cell is taken out (c) the switch is ON (d) the loop is complete
36. 36.True or false: a copper wire is a conductor. (a) False (b) True
37. 37.🔌 Which part of a screwdriver should an electrician hold? (a) the metal tip (b) the steel shaft (c) the bare end (d) the plastic handle
38. 38.🔍 Which is the odd one out? (a) a rubber eraser (b) a copper wire (c) a steel spoon (d) a steel coin
39. 39.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) only one (b) both of them (c) it does not matter (d) none
40. 40.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. A gap in one wire is bridged by a metal paper clip. Does the bulb glow? (a) No (b) Yes

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