Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 779 · 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.🔘 Two switches are in series. When does the bulb glow? (a) never (b) when both are OFF (c) when either is ON (d) when both are ON
2. 2.🔍 Which is the odd one out? (a) a loudspeaker (b) a toaster (c) a buzzer (d) a doorbell
3. 3.True or false: if all wires are joined, the circuit is closed and current flows. (a) False (b) True
4. 4.🔋 6 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
5. 5.💡 5 identical bulbs are joined in series with a 20 V battery (ideal wires). How many volts does each bulb get? =
6. 6.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
7. 7.🔌 Is a glass marble a conductor or an insulator? (a) a conductor (b) an insulator
8. 8.🔋 Does a battery give electricity or use electricity? (a) uses electricity (b) gives electricity
9. 9.Which of these is safe? (a) build with an adult near (b) poke things in a socket (c) use mains for a project (d) climb an electric pole
10. 10.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) never (b) only when both are OFF (c) only when both are ON (d) when either is ON
11. 11.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. How many bulbs glow?
12. 12.True or false: a tilt switch flips up or down. (a) True (b) False
13. 13.⚠️ Is it safe to poke things in a socket? (a) safe (b) not safe
14. 14.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. Does bulb 2 glow? (a) Yes (b) No
15. 15.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a rubber band across the gap. Does the bulb glow? (a) Yes (b) No
16. 16.True or false: a ceramic cup is an insulator. (a) False (b) True
17. 17.Which of these is a conductor? (a) a cotton thread (b) a steel coin (c) a rubber band (d) a rubber eraser
18. 18.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
19. 19.🔋 What is a battery? (a) a switch with a lid (b) a kind of bulb (c) one single wire (d) two or more cells joined
20. 20.🔘 A bulb and a cell are joined through 5 switches on 5 side-by-side paths, one switch on each path (parallel). What is the smallest number of switches that must be ON to light the bulb?
21. 21.🔘 When a switch is ON, the circuit is … (a) open (b) broken (c) closed (d) cut
22. 22.🔌 Most metals are good … (a) insulators (b) conductors (c) magnets only (d) batteries
23. 23.True or false: many long-short pairs is the symbol for a bulb. (a) False (b) True
24. 24.💡 A battery lights 2 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
25. 25.Which of these means the circuit is closed? (a) the switch is OFF (b) a wire has come loose (c) all wires are joined (d) a cell is taken out
26. 26.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) False (b) True
27. 27.True or false: to touch a fallen wire is safe. (a) False (b) True
28. 28.🔋 Identical cells side by side (in parallel) give … (a) double the voltage (b) half the voltage (c) no voltage (d) the same voltage
29. 29.🔁 What must there be for a current to flow? (a) a complete loop (b) a broken path (c) one loose end (d) a plastic gap
30. 30.What does a reed switch do? (a) closes near a magnet (b) closes when tipped over (c) slides side to side (d) springs back when let go
31. 31.True or false: if a wire is cut, the circuit is open and no current flows. (a) True (b) False
32. 32.🔘 Which kind of switch flips up or down? (a) a push button (b) a tilt switch (c) a reed switch (d) a toggle switch
33. 33.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) open (b) closed
34. 34.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the filament (b) the glass (c) the base (d) the switch
35. 35.Which of these is not safe? (a) stay away from pylons (b) open a phone charger (c) use small battery cells (d) build with an adult near
36. 36.🔋 How many 1.5 V cells must be joined in series to give 9 V?
37. 37.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) False (b) True
38. 38.True or false: if a wire has come loose, the circuit is open and no current flows. (a) False (b) True
39. 39.True or false: triangle against a bar is the symbol for a bulb. (a) False (b) True
40. 40.🔁 Is the circuit closed or open if a wire has come loose? (a) open (b) closed

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