Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 186 · 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 not safe? (a) climb an electric pole (b) take cells out after use (c) dry your hands first (d) build with an adult near
2. 2.True or false: to build with an adult near is not safe. (a) False (b) True
3. 3.Which of these is an insulator? (a) a glass marble (b) a brass key (c) aluminium foil (d) a graphite rod
4. 4.Which drawing is the symbol for a voltmeter? (a) a circle with a cross (b) a circle with V inside (c) many long-short pairs (d) a plain rectangle
5. 5.🔋 Cells joined + to − in a row (series) give … (a) no voltage (b) the same voltage (c) a bigger voltage (d) a smaller voltage
6. 6.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) none (c) one (d) two
7. 7.🔘 Which kind of switch closes when tipped over? (a) a push button (b) a reed switch (c) a tilt switch (d) a toggle switch
8. 8.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in series (b) by Wi-Fi (c) in parallel (d) not joined
9. 9.Which of these is true of a parallel circuit? (a) many paths for current (b) bulbs share the voltage (c) one bulb out, all go out (d) a break stops every bulb
10. 10.Which of these mainly gives out heat? (a) an electric toy car (b) a night lamp (c) a street light (d) an electric kettle
11. 11.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) the longer line (c) neither line (d) both lines
12. 12.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
13. 13.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) wire (b) battery (c) cell (d) voltmeter
14. 14.🔁 What must there be for a current to flow? (a) a broken path (b) one loose end (c) a complete loop (d) a plastic gap
15. 15.Which of these is an insulator? (a) an iron nail (b) a metal paper clip (c) a brass key (d) a plastic ruler
16. 16.Which of these uses electricity? (a) a mobile phone (b) a generator (c) a wind turbine (d) a battery
17. 17.Which of these is not safe? (a) keep drinks far away (b) build with an adult near (c) poke things in a socket (d) dry your hands first
18. 18.Which of these is not safe? (a) stop if a part gets hot (b) use mains for a project (c) use small battery cells (d) build with an adult near
19. 19.Which of these is true of a series circuit? (a) used in house wiring (b) many paths for current (c) one bulb out, all go out (d) one out, the rest glow
20. 20.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
21. 21.🔁 Is the circuit closed or open if the switch is ON? (a) closed (b) open
22. 22.🔍 Which is the odd one out? (a) a woollen thread (b) a graphite rod (c) a rubber band (d) a glass marble
23. 23.💡 2 identical bulbs are joined in series with a 4 V battery (ideal wires). How many volts does each bulb get? =
24. 24.True or false: a toggle switch slides side to side. (a) False (b) True
25. 25.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
26. 26.Which of these gives us electricity? (a) a computer (b) a generator (c) a refrigerator (d) a television
27. 27.⚡ What does an exhaust fan mainly change electricity into? (a) light (b) heat (c) sound (d) movement
28. 28.Which of these mainly gives out light? (a) a room heater (b) an electric iron (c) a traffic signal (d) a siren
29. 29.True or false: an iron nail is an insulator. (a) True (b) False
30. 30.💡 5 identical bulbs are joined in series with a 5 V battery (ideal wires). How many volts does each bulb get? =
31. 31.True or false: a push button works only while pressed. (a) False (b) True
32. 32.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a ceramic cup across the gap. Does the bulb glow? (a) No (b) Yes
33. 33.🔌 Is a metal paper clip a conductor or an insulator? (a) a conductor (b) an insulator
34. 34.💡 Why is house wiring done in parallel? (a) to save copper only (b) so all go off together (c) to make bulbs dim (d) each gets full voltage
35. 35.💡 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 1 glow? (a) No (b) Yes
36. 36.⚡ What does an electric iron mainly change electricity into? (a) movement (b) light (c) sound (d) heat
37. 37.🔍 Which is the odd one out? (a) a mixer grinder (b) an exhaust fan (c) an electric kettle (d) a table fan
38. 38.Which of these means the circuit is closed? (a) a wire has come loose (b) the bulb is unscrewed (c) a cell is taken out (d) the switch is ON
39. 39.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are OFF (b) only when both are ON (c) never (d) when either is ON
40. 40.True or false: to keep drinks far away is safe. (a) True (b) False

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