Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 378 · 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.💡 In a series circuit, how many paths does the current have? (a) none (b) one for each bulb (c) one (d) two
2. 2.True or false: if a wire is cut, the circuit is open and no current flows. (a) True (b) False
3. 3.Which of these is true of a series circuit? (a) own switch for each bulb (b) many paths for current (c) one out, the rest glow (d) a single current path
4. 4.⚡ What does an exhaust fan mainly change electricity into? (a) sound (b) light (c) movement (d) heat
5. 5.🔍 Which is the odd one out? (a) an iron nail (b) a brass key (c) aluminium foil (d) a woollen thread
6. 6.💡 4 identical bulbs are joined in series with an 8 V battery (ideal wires). How many volts does each bulb get? =
7. 7.💡 5 identical bulbs are joined in series with a 20 V battery (ideal wires). How many volts does each bulb get? =
8. 8.True or false: an LED lamp mainly gives out light. (a) False (b) True
9. 9.💡 6 identical bulbs are in parallel and each bulb has its own switch on its path. 5 of the switches are OFF and the rest are ON. How many bulbs glow?
10. 10.🔘 Which kind of switch closes when tipped over? (a) a tilt switch (b) a toggle switch (c) a push button (d) a slide switch
11. 11.Which of these is safe? (a) stay away from pylons (b) touch a switch when wet (c) throw cells in a fire (d) fly a kite near wires
12. 12.True or false: aluminium foil is an insulator. (a) False (b) True
13. 13.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) junction (b) cell (c) voltmeter (d) capacitor
14. 14.Which of these mainly makes movement? (a) a siren (b) a traffic signal (c) a street light (d) a table fan
15. 15.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
16. 16.⚠️ Is it safe to take cells out after use? (a) safe (b) not safe
17. 17.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
18. 18.🔌 Why are electric wires covered in plastic? (a) plastic is an insulator (b) to make them heavy (c) plastic is a conductor (d) plastic makes current
19. 19.⚡ What do we call a flow of electric charge through a wire? (a) friction (b) sound (c) electric current (d) a magnet
20. 20.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is ON, B is ON and C is ON. Does the bulb glow? (a) No (b) Yes
21. 21.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
22. 22.🔦 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 graphite rod. Does the bulb glow? (a) No (b) Yes
23. 23.🔌 Which part of a screwdriver should an electrician hold? (a) the steel shaft (b) the bare end (c) the metal tip (d) the plastic handle
24. 24.🔁 Is the circuit closed or open if a wire is cut? (a) closed (b) open
25. 25.⚡ What does an electric kettle mainly change electricity into? (a) sound (b) heat (c) light (d) movement
26. 26.⚡ What does a traffic signal mainly change electricity into? (a) heat (b) movement (c) light (d) sound
27. 27.True or false: to dry your hands first is not safe. (a) False (b) True
28. 28.⚠️ Why must we never touch switches with wet hands? (a) water carries current (b) it spoils the paint (c) water makes it cold (d) it is just untidy
29. 29.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) battery (b) ammeter (c) capacitor (d) wire
30. 30.🔘 When a switch is ON, the circuit is … (a) open (b) broken (c) cut (d) closed
31. 31.🔋 2 identical 2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
32. 32.True or false: a circle with M inside is the symbol for a motor. (a) True (b) False
33. 33.⚠️ Is it safe to stay away from pylons? (a) safe (b) not safe
34. 34.True or false: a ceramic cup is a conductor. (a) True (b) False
35. 35.True or false: “used in house wiring” is true of a parallel circuit. (a) True (b) False
36. 36.🔘 Two switches are in series. When does the bulb glow? (a) when both are OFF (b) when both are ON (c) when either is ON (d) never
37. 37.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
38. 38.🔁 Is the circuit closed or open if a cell is taken out? (a) closed (b) open
39. 39.🔌 Which metal is used for most electric wires at home? (a) glass (b) plastic (c) copper (d) rubber
40. 40.Which of these means the circuit is open? (a) the loop is complete (b) a wire is cut (c) the switch is ON (d) all wires are joined

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