Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 31 · 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.🔌 Is a ceramic cup a conductor or an insulator? (a) an insulator (b) a conductor
2. 2.True or false: on a cell, “the flat end” means the + (positive) end. (a) True (b) False
3. 3.True or false: a room heater mainly gives out heat. (a) True (b) False
4. 4.🔋 Does a television give electricity or use electricity? (a) gives electricity (b) uses electricity
5. 5.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
6. 6.🔍 Which is the odd one out? (a) a steel spoon (b) a copper wire (c) a graphite rod (d) a cotton thread
7. 7.🔋 4 identical 1.2 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) keep drinks far away (b) dry your hands first (c) touch a switch when wet (d) use small battery cells
9. 9.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) chemical energy (b) movement energy (c) light energy (d) sound energy
10. 10.⚡ What does an LED lamp mainly change electricity into? (a) movement (b) heat (c) light (d) sound
11. 11.💡 A battery lights 3 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
12. 12.🔗 Series or parallel circuit: “own switch for each bulb”? (a) series (b) parallel
13. 13.🔗 Series or parallel circuit: “many paths for current”? (a) series (b) parallel
14. 14.🔌 Is a steel coin a conductor or an insulator? (a) an insulator (b) a conductor
15. 15.💡 4 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
16. 16.🔁 Is the circuit closed or open if all wires are joined? (a) open (b) closed
17. 17.Which of these mainly makes sound? (a) a school bell (b) a room heater (c) an electric iron (d) a street light
18. 18.💡 Why is house wiring done in parallel? (a) to save copper only (b) to make bulbs dim (c) so all go off together (d) each gets full voltage
19. 19.🔌 Is a copper wire a conductor or an insulator? (a) a conductor (b) an insulator
20. 20.Which of these is not safe? (a) build with an adult near (b) use small battery cells (c) keep drinks far away (d) poke things in a socket
21. 21.🔍 Which is the odd one out? (a) a plastic ruler (b) an iron nail (c) a dry cork (d) a woollen thread
22. 22.Which of these is safe? (a) throw cells in a fire (b) climb an electric pole (c) use mains for a project (d) take cells out after use
23. 23.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
24. 24.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) True (b) False
25. 25.🔁 Is the circuit closed or open if the loop is complete? (a) closed (b) open
26. 26.True or false: a circle with V inside is the symbol for a voltmeter. (a) False (b) True
27. 27.💡 A battery lights 3 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
28. 28.Which of these is an insulator? (a) a graphite rod (b) a steel spoon (c) a safety pin (d) a wooden stick
29. 29.Which of these gives us electricity? (a) a mobile phone (b) a washing machine (c) a wind turbine (d) a refrigerator
30. 30.Which of these mainly makes movement? (a) a torch (b) a school bell (c) a ceiling fan (d) a siren
31. 31.🔌 Is a rubber eraser a conductor or an insulator? (a) an insulator (b) a conductor
32. 32.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
33. 33.⚠️ Is it safe to fly kites in open fields? (a) not safe (b) safe
34. 34.🔌 Why are electric wires covered in plastic? (a) to make them heavy (b) plastic makes current (c) plastic is a conductor (d) plastic is an insulator
35. 35.🔍 Which is the odd one out? (a) an iron nail (b) a plastic ruler (c) a copper wire (d) a steel spoon
36. 36.Which of these is safe? (a) use mains for a project (b) stop if a part gets hot (c) throw cells in a fire (d) touch a fallen wire
37. 37.True or false: to build with an adult near is not safe. (a) False (b) True
38. 38.🔁 Is the circuit closed or open if a wire has come loose? (a) open (b) closed
39. 39.True or false: a tilt switch works only while pressed. (a) False (b) True
40. 40.💡 3 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =

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