Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 283 · 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: if a wire has come loose, the circuit is closed and current flows. (a) False (b) True
2. 2.🔍 Which is the odd one out? (a) a ceramic cup (b) a brass key (c) aluminium foil (d) a graphite rod
3. 3.⚠️ Is it safe to take cells out after use? (a) not safe (b) safe
4. 4.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 loop is complete
5. 5.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) junction (b) switch (c) resistor (d) battery
6. 6.True or false: to use a cable with cuts is safe. (a) False (b) True
7. 7.🔋 Cells joined + to − in a row (series) give … (a) no voltage (b) a smaller voltage (c) a bigger voltage (d) the same voltage
8. 8.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
9. 9.True or false: a long and a short line is the symbol for a cell. (a) False (b) True
10. 10.⚠️ Is it safe to keep drinks far away? (a) safe (b) not safe
11. 11.True or false: if a wire is cut, the circuit is open and no current flows. (a) True (b) False
12. 12.🔘 Which kind of switch springs back when let go? (a) a push button (b) a reed switch (c) a toggle switch (d) a tilt switch
13. 13.🔍 Which is the odd one out? (a) stop if a part gets hot (b) fly kites in open fields (c) climb an electric pole (d) use small battery cells
14. 14.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) so all go off together (c) to save copper only (d) to make bulbs dim
15. 15.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. How many bulbs glow?
16. 16.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
17. 17.✏️ In a circuit diagram, which part is drawn as a circle with A inside? (a) LED (b) voltmeter (c) cell (d) ammeter
18. 18.🔌 Is a plastic ruler a conductor or an insulator? (a) an insulator (b) a conductor
19. 19.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
20. 20.🔋 Does a refrigerator give electricity or use electricity? (a) uses electricity (b) gives electricity
21. 21.Which of these gives us electricity? (a) a power station (b) a television (c) a computer (d) a washing machine
22. 22.💡 4 identical bulbs are in parallel and each bulb has its own switch on its path. 2 of the switches are OFF and the rest are ON. How many bulbs glow?
23. 23.🔁 What must there be for a current to flow? (a) one loose end (b) a complete loop (c) a plastic gap (d) a broken path
24. 24.💡 In a series circuit, how many paths does the current have? (a) two (b) none (c) one (d) one for each bulb
25. 25.🔦 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) Yes (b) No
26. 26.🔋 Does a cell give electricity or use electricity? (a) uses electricity (b) gives electricity
27. 27.✏️ In a circuit diagram, which part is drawn as a plain rectangle? (a) voltmeter (b) resistor (c) battery (d) cell
28. 28.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
29. 29.💡 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. How many bulbs glow?
30. 30.🔋 8 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
31. 31.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a bulb (b) a plug top (c) a fuse or MCB (d) a long wire
32. 32.⚠️ Is it safe to open a phone charger? (a) safe (b) not safe
33. 33.Which of these means the circuit is open? (a) a wire has come loose (b) the switch is ON (c) all wires are joined (d) the loop is complete
34. 34.🔌 Is a steel coin a conductor or an insulator? (a) an insulator (b) a conductor
35. 35.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) movement energy (b) sound energy (c) light energy (d) chemical energy
36. 36.Which of these is safe? (a) use mains for a project (b) touch a fallen wire (c) take cells out after use (d) climb an electric pole
37. 37.🔌 Is a wooden stick a conductor or an insulator? (a) an insulator (b) a conductor
38. 38.⚠️ Why must we never touch switches with wet hands? (a) water makes it cold (b) water carries current (c) it spoils the paint (d) it is just untidy
39. 39.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by aluminium foil. Does the bulb glow? (a) Yes (b) No
40. 40.Which of these is safe? (a) stop if a part gets hot (b) climb an electric pole (c) open a phone charger (d) fly a kite near wires

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