Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 284 · 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.💡 4 identical bulbs are joined in series with an 8 V battery (ideal wires). How many volts does each bulb get? =
2. 2.🔦 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 an iron nail. Does the bulb glow? (a) No (b) Yes
3. 3.⚡ What does a traffic signal mainly change electricity into? (a) sound (b) heat (c) movement (d) light
4. 4.True or false: a circle with M inside is the symbol for a motor. (a) False (b) True
5. 5.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a plug top (b) a long wire (c) a fuse or MCB (d) a bulb
6. 6.💡 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
7. 7.🔍 Which is the odd one out? (a) dry your hands first (b) throw cells in a fire (c) use small battery cells (d) stay away from pylons
8. 8.Which of these is safe? (a) use mains for a project (b) build with an adult near (c) touch a switch when wet (d) open a phone charger
9. 9.⚡ Which tiny particles drift along a metal wire to carry the current? (a) electrons (b) water drops (c) dust particles (d) photons
10. 10.True or false: a copper wire is an insulator. (a) False (b) True
11. 11.🔦 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
12. 12.True or false: a long and a short line is the symbol for a motor. (a) True (b) False
13. 13.💡 A battery lights 3 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
14. 14.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
15. 15.🔋 A 9 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
16. 16.True or false: one tall, one short bar is the symbol for a battery. (a) True (b) False
17. 17.Which of these is an insulator? (a) a metal paper clip (b) a steel spoon (c) a cotton thread (d) a copper wire
18. 18.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
19. 19.⚠️ Is it safe to keep drinks far away? (a) not safe (b) safe
20. 20.Which of these gives us electricity? (a) an air conditioner (b) a water pump (c) a television (d) a bicycle dynamo
21. 21.🔋 Identical cells side by side (in parallel) give … (a) the same voltage (b) half the voltage (c) no voltage (d) double the voltage
22. 22.True or false: if all wires are joined, the circuit is closed and current flows. (a) False (b) True
23. 23.🔌 Is an iron nail a conductor or an insulator? (a) an insulator (b) a conductor
24. 24.Which of these mainly gives out heat? (a) a toaster (b) a mixer grinder (c) a traffic signal (d) a buzzer
25. 25.🔁 Is the circuit closed or open if a wire has come loose? (a) open (b) closed
26. 26.What does a toggle switch do? (a) closes when tipped over (b) slides side to side (c) works only while pressed (d) stays where you flip it
27. 27.🔍 Which is the odd one out? (a) a mixer grinder (b) a night lamp (c) a torch (d) a traffic signal
28. 28.True or false: if the bulb is unscrewed, the circuit is closed and current flows. (a) True (b) False
29. 29.🔍 Which is the odd one out? (a) aluminium foil (b) a copper wire (c) a dry cork (d) a steel coin
30. 30.🔍 Which is the odd one out? (a) a dry cork (b) an iron nail (c) a cotton thread (d) a paper strip
31. 31.True or false: a tilt switch closes when tipped over. (a) True (b) False
32. 32.🔌 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
33. 33.🔗 Series or parallel circuit: “used in house wiring”? (a) series (b) parallel
34. 34.🔍 Which is the odd one out? (a) a metal paper clip (b) a woollen thread (c) aluminium foil (d) a copper wire
35. 35.🔘 Two switches are in series. When does the bulb glow? (a) when both are OFF (b) when both are ON (c) never (d) when either is ON
36. 36.What does a push button do? (a) stays where you flip it (b) closes near a magnet (c) slides side to side (d) works only while pressed
37. 37.💡 4 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 3 are taken out of their holders. How many bulbs glow?
38. 38.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
39. 39.🔍 Which is the odd one out? (a) a glass marble (b) a safety pin (c) a copper wire (d) a brass key
40. 40.True or false: triangle against a bar is the symbol for a diode. (a) True (b) False

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