Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 158 · 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 of these is true of a series circuit? (a) each gets the full volts (b) used in house wiring (c) many paths for current (d) bulbs share the voltage
2. 2.Which of these gives us electricity? (a) a battery (b) a television (c) a washing machine (d) a computer
3. 3.⚠️ Is it safe to use a cable with cuts? (a) safe (b) not safe
4. 4.🔌 Is a glass marble a conductor or an insulator? (a) an insulator (b) a conductor
5. 5.⚠️ Why must we never touch switches with wet hands? (a) it spoils the paint (b) water carries current (c) water makes it cold (d) it is just untidy
6. 6.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
7. 7.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
8. 8.🔘 A cell and a bulb are joined to 2 side-by-side paths with one switch on each path — A and B (parallel). A is ON and B is OFF. Does the bulb glow? (a) No (b) Yes
9. 9.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) neither line (c) the shorter line (d) the longer line
10. 10.True or false: a toggle switch flips up or down. (a) False (b) True
11. 11.🔌 Is an iron nail a conductor or an insulator? (a) an insulator (b) a conductor
12. 12.True or false: if the bulb is unscrewed, the circuit is open and no current flows. (a) True (b) False
13. 13.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
14. 14.🔋 What is a battery? (a) a kind of bulb (b) two or more cells joined (c) a switch with a lid (d) one single wire
15. 15.Which of these mainly makes movement? (a) a buzzer (b) a rice cooker (c) a loudspeaker (d) an electric drill
16. 16.True or false: “one out, the rest glow” is true of a series circuit. (a) False (b) True
17. 17.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a ceramic cup. Does the bulb glow? (a) No (b) Yes
18. 18.Which of these means the circuit is closed? (a) the bulb is unscrewed (b) the switch is OFF (c) a wire has come loose (d) all wires are joined
19. 19.⚡ What does a room heater mainly change electricity into? (a) light (b) movement (c) heat (d) sound
20. 20.What does a slide switch do? (a) springs back when let go (b) closes when tipped over (c) works only while pressed (d) slides side to side
21. 21.⚠️ Is it safe to stop if a part gets hot? (a) not safe (b) safe
22. 22.💡 2 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
23. 23.Which of these is a conductor? (a) a glass marble (b) a rubber eraser (c) a dry cork (d) a steel coin
24. 24.🔦 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
25. 25.🔦 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 rubber band. Does the bulb glow? (a) No (b) Yes
26. 26.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) capacitor (b) battery (c) cell (d) LED
27. 27.✏️ In a circuit diagram, wires are usually drawn as … (a) straight lines (b) dotted circles (c) wavy lines (d) little stars
28. 28.🔘 A cell and a bulb are joined to two side-by-side paths: path 1 has switches A and B one after another, path 2 has switch C. A is ON, B is ON and C is OFF. Does the bulb glow? (a) Yes (b) No
29. 29.🔘 A cell and a bulb are joined to two side-by-side paths: path 1 has switches A and B one after another, path 2 has switch C. A is ON, B is ON and C is ON. Does the bulb glow? (a) No (b) Yes
30. 30.Which of these mainly gives out heat? (a) a loudspeaker (b) a water heater (c) a ceiling fan (d) a torch
31. 31.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) to save copper only (c) so all go off together (d) each gets full voltage
32. 32.True or false: to take cells out after use is safe. (a) False (b) True
33. 33.True or false: if a wire is cut, the circuit is closed and current flows. (a) True (b) False
34. 34.True or false: a steel spoon is a conductor. (a) False (b) True
35. 35.🔗 Series or parallel circuit: “own switch for each bulb”? (a) parallel (b) series
36. 36.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by aluminium foil. Does the bulb glow? (a) Yes (b) No
37. 37.🔍 Which is the odd one out? (a) a torch (b) a toaster (c) a water heater (d) a rice cooker
38. 38.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they all go out (c) they keep glowing (d) they get dimmer
39. 39.🔦 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
40. 40.What does a toggle switch do? (a) closes when tipped over (b) slides side to side (c) stays where you flip it (d) closes near a magnet

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