Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 403 · 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 circuit diagram, which part is drawn as a circle with V inside? (a) motor (b) voltmeter (c) battery (d) ammeter
2. 2.🔗 Series or parallel circuit: “many paths for current”? (a) series (b) parallel
3. 3.What does a push button do? (a) springs back when let go (b) slides side to side (c) closes when tipped over (d) closes near a magnet
4. 4.🔦 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 a plastic straw. Does the bulb glow? (a) No (b) Yes
5. 5.💡 3 identical bulbs are joined in series with a 12 V battery (ideal wires). How many volts does each bulb get? =
6. 6.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) the shorter line (c) neither line (d) the longer line
7. 7.True or false: a safety pin is an insulator. (a) True (b) False
8. 8.🔋 How many 2 V cells must be joined in series to give 4 V?
9. 9.⚡ What does a night lamp mainly change electricity into? (a) light (b) movement (c) heat (d) sound
10. 10.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
11. 11.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) False (b) True
12. 12.What does a slide switch do? (a) closes when tipped over (b) slides side to side (c) stays where you flip it (d) flips up or down
13. 13.⚠️ Who should be with you when you build a circuit? (a) a trusted adult (b) nobody (c) a stranger online (d) a younger child
14. 14.💡 A battery lights 3 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
15. 15.🔦 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 a cotton thread. Does the bulb glow? (a) No (b) Yes
16. 16.Which of these is true of a parallel circuit? (a) a single current path (b) a break stops every bulb (c) bulbs share the voltage (d) own switch for each bulb
17. 17.🔋 What is a battery? (a) a kind of bulb (b) a switch with a lid (c) two or more cells joined (d) one single wire
18. 18.What does a toggle switch do? (a) works only while pressed (b) closes when tipped over (c) springs back when let go (d) stays where you flip it
19. 19.⚡ Which tiny particles drift along a metal wire to carry the current? (a) photons (b) dust particles (c) electrons (d) water drops
20. 20.True or false: many long-short pairs is the symbol for a battery. (a) True (b) False
21. 21.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a brass key across the gap. Does the bulb glow? (a) No (b) Yes
22. 22.Which of these is not safe? (a) stay away from pylons (b) take cells out after use (c) use small battery cells (d) open a phone charger
23. 23.🔁 Is the circuit closed or open if all wires are joined? (a) open (b) closed
24. 24.🔘 Two switches are in series. When does the bulb glow? (a) never (b) when both are ON (c) when either is ON (d) when both are OFF
25. 25.🔌 Is a steel coin a conductor or an insulator? (a) an insulator (b) a conductor
26. 26.🔍 Which is the odd one out? (a) a copper wire (b) an iron nail (c) a steel coin (d) a paper strip
27. 27.True or false: a long and a short line is the symbol for a cell. (a) True (b) False
28. 28.🔋 Cells joined + to − in a row (series) give … (a) the same voltage (b) no voltage (c) a bigger voltage (d) a smaller voltage
29. 29.Which of these means the circuit is closed? (a) the bulb is unscrewed (b) the switch is OFF (c) all wires are joined (d) a cell is taken out
30. 30.🔘 Which kind of switch works only while pressed? (a) a slide switch (b) a reed switch (c) a tilt switch (d) a push button
31. 31.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
32. 32.🔦 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 a woollen thread. Does the bulb glow? (a) Yes (b) No
33. 33.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. How many bulbs glow?
34. 34.💡 2 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
35. 35.Which drawing is the symbol for a battery? (a) a circle with a cross (b) a circle with V inside (c) many long-short pairs (d) triangle, bar and arrows
36. 36.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
37. 37.✏️ Why do engineers draw circuits with symbols? (a) to make it colourful (b) to hide the circuit (c) symbols are heavier (d) quick and clear for all
38. 38.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
39. 39.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put aluminium foil across the gap. Does the bulb glow? (a) No (b) Yes
40. 40.🔦 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 a brass key. Does the bulb glow? (a) No (b) Yes

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