Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 52 · 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 is the odd one out? (a) a siren (b) a doorbell (c) an electric drill (d) a buzzer
2. 2.🔍 Which is the odd one out? (a) use small battery cells (b) open a phone charger (c) build with an adult near (d) take cells out after use
3. 3.🔁 Is the circuit closed or open if a wire has come loose? (a) closed (b) open
4. 4.True or false: a push button stays where you flip it. (a) True (b) False
5. 5.🔍 Which is the odd one out? (a) use a cable with cuts (b) dry your hands first (c) use small battery cells (d) take cells out after use
6. 6.🔗 Series or parallel circuit: “a single current path”? (a) series (b) parallel
7. 7.🔘 Which kind of switch slides side to side? (a) a reed switch (b) a push button (c) a tilt switch (d) a slide switch
8. 8.💡 6 identical bulbs are joined in parallel (each on its own side-by-side path) with a battery and a closed switch on the main wire. Bulbs 4 and 6 are taken out of their holders. Does bulb 5 glow? (a) Yes (b) No
9. 9.What does a toggle switch do? (a) closes near a magnet (b) works only while pressed (c) slides side to side (d) flips up or down
10. 10.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a woollen thread across the gap. Does the bulb glow? (a) No (b) Yes
11. 11.⚠️ Is it safe to keep drinks far away? (a) safe (b) not safe
12. 12.🔋 How many 1.5 V cells must be joined in series to give 10.5 V?
13. 13.🔘 When a switch is ON, the circuit is … (a) cut (b) broken (c) closed (d) open
14. 14.🔘 A cell and a bulb are joined to 4 side-by-side paths with one switch on each path — A, B, C and D (parallel). A is OFF, B is ON, C is ON and D is ON. Does the bulb glow? (a) Yes (b) No
15. 15.True or false: to poke things in a socket is safe. (a) False (b) True
16. 16.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) light energy (b) sound energy (c) movement energy (d) chemical energy
17. 17.💡 3 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
18. 18.💡 2 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
19. 19.🔘 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 OFF, B is ON and C is OFF. Does the bulb glow? (a) Yes (b) No
20. 20.Which of these means the circuit is open? (a) all wires are joined (b) the switch is ON (c) the loop is complete (d) the switch is OFF
21. 21.🔗 Series or parallel circuit: “a break stops every bulb”? (a) parallel (b) series
22. 22.💡 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
23. 23.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 3 is taken out of its holder. Does bulb 2 glow? (a) Yes (b) No
24. 24.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 3 is taken out of its holder. Does bulb 1 glow? (a) Yes (b) No
25. 25.⚠️ Is it safe to open a phone charger? (a) safe (b) not safe
26. 26.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) by Wi-Fi (c) in parallel (d) in series
27. 27.⚡ A solar panel changes which kind of energy into electricity? (a) chemical energy (b) light energy (c) sound energy (d) wind energy
28. 28.Which of these mainly gives out light? (a) a toaster (b) a ceiling fan (c) a doorbell (d) a traffic signal
29. 29.True or false: a long and a short line is the symbol for a cell. (a) False (b) True
30. 30.💡 3 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
31. 31.True or false: a circle with a cross is the symbol for a resistor. (a) True (b) False
32. 32.🔘 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
33. 33.🔋 A 12 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
34. 34.🔌 Which metal is used for most electric wires at home? (a) glass (b) copper (c) plastic (d) rubber
35. 35.🔘 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
36. 36.🔋 Does a mobile phone give electricity or use electricity? (a) uses electricity (b) gives electricity
37. 37.🔍 Which is the odd one out? (a) an electric kettle (b) an electric toy car (c) an electric iron (d) a toaster
38. 38.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) the longer line (c) neither line (d) the shorter line
39. 39.🔦 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 copper wire. Does the bulb glow? (a) No (b) Yes
40. 40.Which of these mainly gives out light? (a) a torch (b) an electric toy car (c) an exhaust fan (d) a ceiling fan

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