Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 296 · 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.🔋 Does a battery give electricity or use electricity? (a) uses electricity (b) gives electricity
2. 2.True or false: a table fan mainly gives out light. (a) True (b) False
3. 3.🔍 Which is the odd one out? (a) a graphite rod (b) an iron nail (c) a brass key (d) a woollen thread
4. 4.🔁 Is the circuit closed or open if the switch is ON? (a) closed (b) open
5. 5.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
6. 6.⚡ What does a water heater mainly change electricity into? (a) light (b) movement (c) sound (d) heat
7. 7.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) in parallel (c) in series (d) not joined
8. 8.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are ON (b) when either is ON (c) only when both are OFF (d) never
9. 9.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a metal paper clip across the gap. Does the bulb glow? (a) No (b) Yes
10. 10.💡 4 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
11. 11.🔗 Series or parallel circuit: “own switch for each bulb”? (a) series (b) parallel
12. 12.🔋 How many 2 V cells must be joined in series to give 12 V?
13. 13.Which of these is not safe? (a) fly kites in open fields (b) throw cells in a fire (c) use small battery cells (d) build with an adult near
14. 14.🔁 Is the circuit closed or open if all wires are joined? (a) open (b) closed
15. 15.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the base (b) the filament (c) the glass (d) the switch
16. 16.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they all go out (c) they keep glowing (d) they explode
17. 17.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is OFF, B is OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
18. 18.🔘 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) No (b) Yes
19. 19.🔘 Which kind of switch stays where you flip it? (a) a reed switch (b) a slide switch (c) a tilt switch (d) a toggle switch
20. 20.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) False (b) True
21. 21.Which of these is an insulator? (a) a graphite rod (b) a brass key (c) a safety pin (d) a cotton thread
22. 22.🔋 What is a battery? (a) two or more cells joined (b) one single wire (c) a kind of bulb (d) a switch with a lid
23. 23.Which of these is a conductor? (a) a cotton thread (b) a wooden stick (c) a ceramic cup (d) a metal paper clip
24. 24.🔌 Is a safety pin a conductor or an insulator? (a) a conductor (b) an insulator
25. 25.🔍 Which is the odd one out? (a) climb an electric pole (b) dry your hands first (c) stay away from pylons (d) keep drinks far away
26. 26.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
27. 27.💡 Why is house wiring done in parallel? (a) to save copper only (b) each gets full voltage (c) to make bulbs dim (d) so all go off together
28. 28.Which of these is true of a series circuit? (a) one out, the rest glow (b) a single current path (c) used in house wiring (d) own switch for each bulb
29. 29.🔋 7 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
30. 30.Which of these is not safe? (a) stop if a part gets hot (b) fly kites in open fields (c) use small battery cells (d) use mains for a project
31. 31.⚠️ Is it safe to throw cells in a fire? (a) not safe (b) safe
32. 32.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is OFF, B is OFF and C is ON. Does the bulb glow? (a) Yes (b) No
33. 33.Which of these mainly gives out heat? (a) a loudspeaker (b) an electric iron (c) an electric toy car (d) a tube light
34. 34.Which of these is safe? (a) use mains for a project (b) stay away from pylons (c) open a phone charger (d) poke things in a socket
35. 35.🔘 Which kind of switch springs back when let go? (a) a reed switch (b) a tilt switch (c) a push button (d) a toggle switch
36. 36.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
37. 37.True or false: a ceramic cup is an insulator. (a) True (b) False
38. 38.⚡ What does a rice cooker mainly change electricity into? (a) sound (b) heat (c) movement (d) light
39. 39.What does a toggle switch do? (a) works only while pressed (b) stays where you flip it (c) slides side to side (d) closes near a magnet
40. 40.🔌 A gap of dry air between two wires acts as … (a) a conductor (b) a switch that is ON (c) a cell (d) an insulator

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