Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 535 · 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: “many paths for current” is true of a series circuit. (a) True (b) False
2. 2.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a metal paper clip across the gap. Does the bulb glow? (a) No (b) Yes
3. 3.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) to save copper only (c) to make bulbs dim (d) so all go off together
4. 4.💡 In a series circuit, how many paths does the current have? (a) two (b) one (c) none (d) one for each bulb
5. 5.💡 3 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
6. 6.⚠️ Which power source should children use for electronics projects? (a) a wall socket (b) a mains extension board (c) an inverter socket (d) a small battery pack
7. 7.🔍 Which is the odd one out? (a) an electric drill (b) a doorbell (c) a school bell (d) a buzzer
8. 8.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) motor (b) diode (c) voltmeter (d) cell
9. 9.🔌 A gap of dry air between two wires acts as … (a) a cell (b) an insulator (c) a conductor (d) a switch that is ON
10. 10.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they keep glowing (c) they explode (d) they all go out
11. 11.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
12. 12.Which of these means the circuit is closed? (a) the loop is complete (b) a wire is cut (c) a wire has come loose (d) the switch is OFF
13. 13.⚡ What does an electric kettle mainly change electricity into? (a) sound (b) light (c) heat (d) movement
14. 14.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) used in house wiring (c) a single current path (d) one bulb out, all go out
15. 15.🔗 Series or parallel circuit: “each gets the full volts”? (a) series (b) parallel
16. 16.🔌 Which part of a screwdriver should an electrician hold? (a) the plastic handle (b) the metal tip (c) the bare end (d) the steel shaft
17. 17.🔋 How many 1.2 V cells must be joined in series to give 8.4 V?
18. 18.🔋 2 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
19. 19.True or false: a circle with an X in it is the symbol for a bulb. (a) True (b) False
20. 20.🔋 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)? =
21. 21.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
22. 22.⚠️ Is it safe to touch a fallen wire? (a) not safe (b) safe
23. 23.⚠️ Is it safe to take cells out after use? (a) not safe (b) safe
24. 24.True or false: a toggle switch flips up or down. (a) False (b) True
25. 25.🔌 Is a wooden stick a conductor or an insulator? (a) an insulator (b) a conductor
26. 26.🔋 Does a battery give electricity or use electricity? (a) gives electricity (b) uses electricity
27. 27.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
28. 28.🔋 5 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
29. 29.🔘 When a switch is ON, the circuit is … (a) open (b) cut (c) closed (d) broken
30. 30.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) straight lines (c) wavy lines (d) dotted circles
31. 31.⚠️ Is it safe to stay away from pylons? (a) not safe (b) safe
32. 32.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) the shorter line (c) the longer line (d) both lines
33. 33.Which of these means the circuit is open? (a) all wires are joined (b) the loop is complete (c) the switch is OFF (d) the switch is ON
34. 34.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. A gap in one wire is bridged by aluminium foil. Does the bulb glow? (a) Yes (b) No
35. 35.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) pour water on them (b) shout for an adult (c) pull them by the hand (d) wait and watch
36. 36.🔍 Which is the odd one out? (a) open a phone charger (b) use mains for a project (c) keep drinks far away (d) poke things in a socket
37. 37.💡 A battery lights 5 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
38. 38.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
39. 39.Which of these is a conductor? (a) a wooden stick (b) a plastic straw (c) a woollen thread (d) a safety pin
40. 40.True or false: a plastic ruler is a conductor. (a) True (b) False

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