Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 529 · 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.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
2. 2.Which of these is not safe? (a) build with an adult near (b) keep drinks far away (c) stay away from pylons (d) use mains for a project
3. 3.True or false: a night lamp mainly makes sound. (a) False (b) True
4. 4.⚠️ Is it safe to open a phone charger? (a) safe (b) not safe
5. 5.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) each gets full voltage (c) to save copper only (d) so all go off together
6. 6.Which of these is an insulator? (a) a graphite rod (b) a copper wire (c) a plastic ruler (d) a metal paper clip
7. 7.🔋 6 identical 3 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
8. 8.🔍 Which is the odd one out? (a) a safety pin (b) a plastic ruler (c) an iron nail (d) aluminium foil
9. 9.🔌 Is a plastic ruler a conductor or an insulator? (a) a conductor (b) an insulator
10. 10.🔦 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
11. 11.🔦 A circuit has a new 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 brass key. Does the bulb glow? (a) No (b) Yes
12. 12.🔦 A circuit has a new 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) No (b) Yes
13. 13.Which of these is safe? (a) open a phone charger (b) touch a fallen wire (c) use a cable with cuts (d) stop if a part gets hot
14. 14.Which drawing is the symbol for a motor? (a) many long-short pairs (b) a circle with M inside (c) a dot where wires meet (d) one tall, one short bar
15. 15.🔌 Why are electric wires covered in plastic? (a) plastic makes current (b) plastic is a conductor (c) plastic is an insulator (d) to make them heavy
16. 16.⚠️ Is it safe to touch a switch when wet? (a) safe (b) not safe
17. 17.⚠️ Is it safe to poke things in a socket? (a) safe (b) not safe
18. 18.🔍 Which is the odd one out? (a) a steel coin (b) a glass marble (c) a paper strip (d) a ceramic cup
19. 19.💡 In a series circuit, how many paths does the current have? (a) one (b) none (c) one for each bulb (d) two
20. 20.🔘 When a switch is ON, the circuit is … (a) closed (b) broken (c) cut (d) open
21. 21.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) resistor (b) diode (c) battery (d) LED
22. 22.🔍 Which is the odd one out? (a) fly kites in open fields (b) fly a kite near wires (c) touch a switch when wet (d) throw cells in a fire
23. 23.⚡ What does a loudspeaker mainly change electricity into? (a) heat (b) light (c) sound (d) movement
24. 24.Which of these means the circuit is closed? (a) a wire has come loose (b) the bulb is unscrewed (c) a wire is cut (d) all wires are joined
25. 25.Which of these is a conductor? (a) a glass marble (b) a steel spoon (c) a rubber eraser (d) a dry cork
26. 26.Which of these is an insulator? (a) a woollen thread (b) a steel spoon (c) a copper wire (d) a brass key
27. 27.Which of these is true of a series circuit? (a) used in house wiring (b) many paths for current (c) own switch for each bulb (d) a single current path
28. 28.🔦 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 paper strip. Does the bulb glow? (a) Yes (b) No
29. 29.True or false: a toggle switch flips up or down. (a) True (b) False
30. 30.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
31. 31.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) False (b) True
32. 32.True or false: a reed switch closes when tipped over. (a) False (b) True
33. 33.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
34. 34.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
35. 35.True or false: if the loop is complete, the circuit is open and no current flows. (a) True (b) False
36. 36.What does a slide switch do? (a) springs back when let go (b) slides side to side (c) flips up or down (d) stays where you flip it
37. 37.True or false: “many paths for current” is true of a parallel circuit. (a) True (b) False
38. 38.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a rubber eraser across the gap. Does the bulb glow? (a) No (b) Yes
39. 39.Which of these uses electricity? (a) a bicycle dynamo (b) a solar panel (c) an air conditioner (d) a generator
40. 40.Which of these is true of a series circuit? (a) many paths for current (b) a break stops every bulb (c) own switch for each bulb (d) each gets the full volts

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