Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 317 · 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.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) series (b) parallel
2. 2.Which of these uses electricity? (a) a cell (b) a bicycle dynamo (c) a battery (d) a computer
3. 3.💡 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 5 glow? (a) Yes (b) No
4. 4.⚠️ Is it safe to stop if a part gets hot? (a) safe (b) not safe
5. 5.🔍 Which is the odd one out? (a) throw cells in a fire (b) stop if a part gets hot (c) take cells out after use (d) use small battery cells
6. 6.True or false: to stay away from pylons is safe. (a) False (b) True
7. 7.🔘 A bulb and a cell are joined through 2 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
8. 8.✏️ In a circuit diagram, wires are usually drawn as … (a) wavy lines (b) straight lines (c) little stars (d) dotted circles
9. 9.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) the shorter line (c) the longer line (d) neither line
10. 10.🔗 Series or parallel circuit: “own switch for each bulb”? (a) parallel (b) series
11. 11.Which of these is not safe? (a) build with an adult near (b) take cells out after use (c) use a cable with cuts (d) dry your hands first
12. 12.🔋 4 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
13. 13.🔋 How many 1.2 V cells must be joined in series to give 3.6 V?
14. 14.🔋 3 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
15. 15.⚡ A cell changes stored chemical energy into which kind of energy? (a) sound energy (b) wind energy (c) nuclear energy (d) electrical energy
16. 16.⚠️ Who should be with you when you build a circuit? (a) a stranger online (b) a younger child (c) nobody (d) a trusted adult
17. 17.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. Does the bulb glow? (a) No (b) Yes
18. 18.Which of these is true of a parallel circuit? (a) used in house wiring (b) a break stops every bulb (c) bulbs share the voltage (d) one bulb out, all go out
19. 19.🔋 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)? =
20. 20.🔋 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)? =
21. 21.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are OFF (b) when either is ON (c) never (d) only when both are ON
22. 22.⚡ What do we call a flow of electric charge through a wire? (a) electric current (b) friction (c) a magnet (d) sound
23. 23.🔋 Does a generator give electricity or use electricity? (a) uses electricity (b) gives electricity
24. 24.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
25. 25.True or false: if the switch is ON, the circuit is open and no current flows. (a) False (b) True
26. 26.🔋 Does a cell give electricity or use electricity? (a) uses electricity (b) gives electricity
27. 27.🔋 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)? =
28. 28.⚡ A solar panel changes which kind of energy into electricity? (a) sound energy (b) wind energy (c) light energy (d) chemical energy
29. 29.Which of these is safe? (a) use mains for a project (b) use a cable with cuts (c) keep drinks far away (d) throw cells in a fire
30. 30.True or false: a graphite rod is a conductor. (a) True (b) False
31. 31.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
32. 32.True or false: to stop if a part gets hot is safe. (a) True (b) False
33. 33.💡 2 identical bulbs are joined in series with a 4 V battery (ideal wires). How many volts does each bulb get? =
34. 34.🔘 Two switches are in series. When does the bulb glow? (a) when both are ON (b) never (c) when either is ON (d) when both are OFF
35. 35.💡 A battery lights 2 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
36. 36.Which of these means the circuit is open? (a) the loop is complete (b) the switch is ON (c) all wires are joined (d) the switch is OFF
37. 37.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
38. 38.🔘 When a switch is ON, the circuit is … (a) closed (b) open (c) broken (d) cut
39. 39.💡 3 identical bulbs are in parallel and each bulb has its own switch on its path. 1 of the switches is OFF and the rest are ON. How many bulbs glow?
40. 40.⚠️ Is it safe to poke things in a socket? (a) safe (b) not safe

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