Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 562 · 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.True or false: a dry cork is a conductor. (a) False (b) True
2. 2.True or false: a street light mainly gives out light. (a) True (b) False
3. 3.True or false: if the bulb is unscrewed, the circuit is closed and current flows. (a) False (b) True
4. 4.💡 5 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
5. 5.Which drawing is the symbol for a battery? (a) a circle with A inside (b) a straight line (c) many long-short pairs (d) a line lifted at a gap
6. 6.🔘 Which kind of switch flips up or down? (a) a toggle switch (b) a tilt switch (c) a reed switch (d) a slide switch
7. 7.🔦 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 ceramic cup. Does the bulb glow? (a) Yes (b) No
8. 8.Which drawing is the symbol for a cell? (a) triangle against a bar (b) a line lifted at a gap (c) a long and a short line (d) a circle with M inside
9. 9.Which of these is a conductor? (a) a rubber band (b) a glass marble (c) a paper strip (d) a steel spoon
10. 10.Which of these mainly gives out light? (a) a doorbell (b) a toaster (c) a room heater (d) a traffic signal
11. 11.💡 4 identical bulbs are joined in series 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.🔋 8 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)? =
13. 13.🔋 How many volts does one ordinary torch cell give? (a) 15 V (b) 0.5 V (c) 1.5 V (d) 230 V
14. 14.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put an iron nail across the gap. Does the bulb glow? (a) Yes (b) No
15. 15.Which of these gives us electricity? (a) a television (b) an air conditioner (c) a cell (d) a washing machine
16. 16.💡 3 identical bulbs are joined in series with a 3 V battery (ideal wires). How many volts does each bulb get? =
17. 17.🔋 How many 2 V cells must be joined in series to give 6 V?
18. 18.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they get dimmer (c) they all go out (d) they keep glowing
19. 19.True or false: a glass marble is a conductor. (a) True (b) False
20. 20.⚠️ Is it safe to dry your hands first? (a) not safe (b) safe
21. 21.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
22. 22.🔁 What must there be for a current to flow? (a) a plastic gap (b) one loose end (c) a broken path (d) a complete loop
23. 23.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) not joined (c) in series (d) in parallel
24. 24.🔍 Which is the odd one out? (a) a copper wire (b) a graphite rod (c) an iron nail (d) a plastic ruler
25. 25.🔋 4 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)? =
26. 26.⚠️ Is it safe to build with an adult near? (a) not safe (b) safe
27. 27.True or false: a ceiling fan mainly gives out light. (a) True (b) False
28. 28.Which drawing is the symbol for a cell? (a) one tall, one short bar (b) a circle with V inside (c) triangle against a bar (d) a circle with a cross
29. 29.Which of these mainly makes movement? (a) a torch (b) a mixer grinder (c) a water heater (d) an LED lamp
30. 30.💡 Why is house wiring done in parallel? (a) so all go off together (b) to make bulbs dim (c) to save copper only (d) each gets full voltage
31. 31.🔍 Which is the odd one out? (a) touch a switch when wet (b) dry your hands first (c) climb an electric pole (d) use mains for a project
32. 32.🔘 Which kind of switch closes when tipped over? (a) a reed switch (b) a tilt switch (c) a slide switch (d) a toggle switch
33. 33.Which drawing is the symbol for a diode? (a) triangle, bar and arrows (b) triangle against a bar (c) two equal parallel lines (d) many long-short pairs
34. 34.💡 5 identical bulbs are joined in series with a 7.5 V battery (ideal wires). How many volts does each bulb get? =
35. 35.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a dry cork across the gap. Does the bulb glow? (a) No (b) Yes
36. 36.💡 A battery lights 3 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
37. 37.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) movement energy (b) sound energy (c) chemical energy (d) light energy
38. 38.Which of these uses electricity? (a) a solar panel (b) a computer (c) a cell (d) a battery
39. 39.True or false: a copper wire is an insulator. (a) True (b) False
40. 40.Which of these is a conductor? (a) a ceramic cup (b) a copper wire (c) a plastic ruler (d) a wooden stick

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