Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 699 · 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.🔌 Why are electric wires covered in plastic? (a) to make them heavy (b) plastic is a conductor (c) plastic is an insulator (d) plastic makes current
2. 2.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) cell (b) junction (c) switch (d) resistor
3. 3.🔗 Series or parallel circuit: “one out, the rest glow”? (a) parallel (b) series
4. 4.🔍 Which is the odd one out? (a) build with an adult near (b) keep drinks far away (c) take cells out after use (d) use mains for a project
5. 5.True or false: a woollen thread is a conductor. (a) True (b) False
6. 6.Which drawing is the symbol for an ammeter? (a) a long and a short line (b) triangle, bar and arrows (c) a circle with A inside (d) two equal parallel lines
7. 7.Which of these mainly gives out light? (a) an electric kettle (b) an electric iron (c) a mixer grinder (d) a torch
8. 8.🔍 Which is the odd one out? (a) a mixer grinder (b) a street light (c) an exhaust fan (d) an electric toy car
9. 9.🔁 Is the circuit closed or open if a cell is taken out? (a) closed (b) open
10. 10.🔁 Is the circuit closed or open if the switch is ON? (a) closed (b) open
11. 11.💡 5 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. Bulb 4 is taken out of its holder. How many bulbs glow?
12. 12.💡 Why is house wiring done in parallel? (a) so all go off together (b) to make bulbs dim (c) each gets full voltage (d) to save copper only
13. 13.🔘 Which kind of switch closes near a magnet? (a) a tilt switch (b) a push button (c) a reed switch (d) a toggle switch
14. 14.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
15. 15.🔍 Which is the odd one out? (a) poke things in a socket (b) stop if a part gets hot (c) use a cable with cuts (d) use mains for a project
16. 16.🔋 Does a battery give electricity or use electricity? (a) gives electricity (b) uses electricity
17. 17.🔦 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 eraser. Does the bulb glow? (a) No (b) Yes
18. 18.🔍 Which is the odd one out? (a) a street light (b) a night lamp (c) a tube light (d) a water heater
19. 19.Which of these is true of a series circuit? (a) one out, the rest glow (b) used in house wiring (c) own switch for each bulb (d) a single current path
20. 20.True or false: a dry cork is an insulator. (a) False (b) True
21. 21.🔍 Which is the odd one out? (a) a graphite rod (b) a copper wire (c) aluminium foil (d) a glass marble
22. 22.🔋 Cells joined + to − in a row (series) give … (a) no voltage (b) a bigger voltage (c) the same voltage (d) a smaller voltage
23. 23.🔁 What must there be for a current to flow? (a) a broken path (b) a plastic gap (c) one loose end (d) a complete loop
24. 24.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put aluminium foil across the gap. Does the bulb glow? (a) No (b) Yes
25. 25.🔋 A 12 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
26. 26.🔘 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
27. 27.⚠️ Is it safe to touch a fallen wire? (a) not safe (b) safe
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 ON. Does the bulb glow? (a) Yes (b) No
29. 29.💡 A battery lights 3 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
30. 30.⚡ A fan changes electrical energy mainly into which kind of energy? (a) light energy (b) chemical energy (c) sound energy (d) movement energy
31. 31.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) none (c) two (d) one
32. 32.True or false: a brass key is an insulator. (a) True (b) False
33. 33.True or false: if a wire is cut, the circuit is closed and current flows. (a) True (b) False
34. 34.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) by Wi-Fi (c) in series (d) not joined
35. 35.🔍 Which is the odd one out? (a) a ceramic cup (b) a copper wire (c) a dry cork (d) a plastic straw
36. 36.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) one out, the rest glow (c) a break stops every bulb (d) one bulb out, all go out
37. 37.💡 2 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
38. 38.🔋 4 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
39. 39.Which of these is true of a parallel circuit? (a) each gets the full volts (b) bulbs share the voltage (c) a break stops every bulb (d) one bulb out, all go out
40. 40.🔋 Does a mobile phone give electricity or use electricity? (a) uses electricity (b) gives electricity

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