Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 83 · 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 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 paper strip. Does the bulb glow? (a) No (b) Yes
2. 2.True or false: to dry your hands first is not safe. (a) False (b) True
3. 3.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) never (b) only when both are OFF (c) when either is ON (d) only when both are ON
4. 4.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is OFF, B is ON, C is OFF and D is ON. Does the bulb glow? (a) Yes (b) No
5. 5.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
6. 6.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a fuse or MCB (b) a long wire (c) a bulb (d) a plug top
7. 7.Which of these mainly makes sound? (a) a siren (b) a street light (c) a room heater (d) a ceiling fan
8. 8.🔋 Does a water pump give electricity or use electricity? (a) gives electricity (b) uses electricity
9. 9.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they explode (c) they keep glowing (d) they get dimmer
10. 10.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) motor (b) wire (c) switch (d) battery
11. 11.🔋 Does a generator give electricity or use electricity? (a) uses electricity (b) gives electricity
12. 12.⚡ What does a room heater mainly change electricity into? (a) movement (b) heat (c) light (d) sound
13. 13.🔍 Which is the odd one out? (a) touch a fallen wire (b) use small battery cells (c) fly kites in open fields (d) stop if a part gets hot
14. 14.💡 2 identical bulbs are joined in series with a 2 V battery (ideal wires). How many volts does each bulb get? =
15. 15.🔋 What should you do with used-up cells? (a) throw them in a fire (b) cut them open (c) give them for recycling (d) bury them in soil
16. 16.🔍 Which is the odd one out? (a) throw cells in a fire (b) take cells out after use (c) stay away from pylons (d) fly kites in open fields
17. 17.🔁 Is the circuit closed or open if the switch is OFF? (a) open (b) closed
18. 18.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
19. 19.🔋 How many volts does one ordinary torch cell give? (a) 15 V (b) 1.5 V (c) 230 V (d) 0.5 V
20. 20.Which of these means the circuit is open? (a) the switch is ON (b) all wires are joined (c) a cell is taken out (d) the loop is complete
21. 21.🔌 Which metal is used for most electric wires at home? (a) copper (b) plastic (c) glass (d) rubber
22. 22.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a glass marble across the gap. Does the bulb glow? (a) Yes (b) No
23. 23.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
24. 24.💡 In a series circuit, how many paths does the current have? (a) two (b) one for each bulb (c) one (d) none
25. 25.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
26. 26.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
27. 27.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) diode (b) capacitor (c) bulb (d) battery
28. 28.⚡ A cell changes stored chemical energy into which kind of energy? (a) sound energy (b) wind energy (c) electrical energy (d) nuclear energy
29. 29.✏️ Why do engineers draw circuits with symbols? (a) symbols are heavier (b) to hide the circuit (c) quick and clear for all (d) to make it colourful
30. 30.⚡ A fan changes electrical energy mainly into which kind of energy? (a) chemical energy (b) movement energy (c) light energy (d) sound energy
31. 31.Which of these is an insulator? (a) a brass key (b) a steel spoon (c) a metal paper clip (d) a rubber eraser
32. 32.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) LED (b) cell (c) bulb (d) switch
33. 33.🔌 Is a dry cork a conductor or an insulator? (a) a conductor (b) an insulator
34. 34.True or false: to use small battery cells is not safe. (a) True (b) False
35. 35.True or false: an iron nail is a conductor. (a) False (b) True
36. 36.True or false: on a cell, “the flat end” means the + (positive) end. (a) True (b) False
37. 37.🔗 Series or parallel circuit: “each gets the full volts”? (a) parallel (b) series
38. 38.🔋 Identical cells side by side (in parallel) give … (a) no voltage (b) double the voltage (c) half the voltage (d) the same voltage
39. 39.True or false: a tilt switch closes when tipped over. (a) False (b) True
40. 40.🔋 What is a battery? (a) a switch with a lid (b) one single wire (c) a kind of bulb (d) two or more cells joined

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