Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 647 · 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.💡 2 identical bulbs are joined in series with a 3 V battery (ideal wires). How many volts does each bulb get? =
2. 2.Which of these is not safe? (a) build with an adult near (b) throw cells in a fire (c) stop if a part gets hot (d) keep drinks far away
3. 3.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
4. 4.✏️ In a cell symbol, which line is the + terminal? (a) the longer line (b) both lines (c) the shorter line (d) neither line
5. 5.🔘 Which kind of switch slides side to side? (a) a push button (b) a tilt switch (c) a slide switch (d) a toggle switch
6. 6.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) light energy (b) sound energy (c) chemical energy (d) movement energy
7. 7.🔘 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 ON. Does the bulb glow? (a) No (b) Yes
8. 8.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is OFF and B is OFF. Does the bulb glow? (a) No (b) Yes
9. 9.✏️ Why do engineers draw circuits with symbols? (a) to hide the circuit (b) quick and clear for all (c) symbols are heavier (d) to make it colourful
10. 10.🔘 A bulb and a cell are joined through 2 switches on 2 side-by-side paths, one switch on each path (parallel). What is the smallest number of switches that must be ON to light the bulb?
11. 11.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) none (c) two (d) one
12. 12.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) capacitor (b) cell (c) bulb (d) junction
13. 13.💡 3 identical bulbs are joined in series with a 4.5 V battery (ideal wires). How many volts does each bulb get? =
14. 14.🔗 Series or parallel circuit: “own switch for each bulb”? (a) parallel (b) series
15. 15.Which of these is true of a series circuit? (a) one out, the rest glow (b) each gets the full volts (c) a break stops every bulb (d) used in house wiring
16. 16.True or false: to build with an adult near is not safe. (a) True (b) False
17. 17.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is OFF and B is ON. Does the bulb glow? (a) Yes (b) No
18. 18.🔌 Is a steel coin a conductor or an insulator? (a) a conductor (b) an insulator
19. 19.⚠️ Is it safe to keep drinks far away? (a) safe (b) not safe
20. 20.💡 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?
21. 21.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
22. 22.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
23. 23.🔗 Series or parallel circuit: “used in house wiring”? (a) series (b) parallel
24. 24.⚠️ Why must we never touch switches with wet hands? (a) it spoils the paint (b) water makes it cold (c) it is just untidy (d) water carries current
25. 25.True or false: a metal paper clip is an insulator. (a) False (b) True
26. 26.🔋 How many 2 V cells must be joined in series to give 10 V?
27. 27.⚠️ Is it safe to take cells out after use? (a) not safe (b) safe
28. 28.🔁 Is the circuit closed or open if all wires are joined? (a) closed (b) open
29. 29.🔋 6 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)? =
30. 30.🔋 Does a cell give electricity or use electricity? (a) gives electricity (b) uses electricity
31. 31.True or false: a street light mainly gives out light. (a) True (b) False
32. 32.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
33. 33.Which drawing is the symbol for an LED? (a) many long-short pairs (b) triangle, bar and arrows (c) a line lifted at a gap (d) two or more cell symbols
34. 34.What does a slide switch do? (a) slides side to side (b) springs back when let go (c) stays where you flip it (d) closes when tipped over
35. 35.Which of these means the circuit is closed? (a) a wire is cut (b) the switch is OFF (c) the bulb is unscrewed (d) the switch is ON
36. 36.⚡ A solar panel changes which kind of energy into electricity? (a) light energy (b) sound energy (c) wind energy (d) chemical energy
37. 37.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) wait and watch (b) shout for an adult (c) pull them by the hand (d) pour water on them
38. 38.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) cell (b) ammeter (c) wire (d) diode
39. 39.💡 6 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.Which of these gives us electricity? (a) a water pump (b) a generator (c) a television (d) a mobile phone

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