Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 981 · 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.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a woollen thread across the gap. Does the bulb glow? (a) Yes (b) No
2. 2.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) none (b) it does not matter (c) both of them (d) only one
3. 3.Which drawing is the symbol for a diode? (a) a circle with V inside (b) triangle against a bar (c) a long and a short line (d) a small empty box
4. 4.True or false: a woollen thread is an insulator. (a) True (b) False
5. 5.🔍 Which is the odd one out? (a) build with an adult near (b) throw cells in a fire (c) use mains for a project (d) touch a fallen wire
6. 6.🔦 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
7. 7.🔋 2 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
8. 8.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a rubber band across the gap. Does the bulb glow? (a) No (b) Yes
9. 9.Which of these gives us electricity? (a) a television (b) a power station (c) an air conditioner (d) a computer
10. 10.Which of these is not safe? (a) touch a fallen wire (b) fly kites in open fields (c) stop if a part gets hot (d) stay away from pylons
11. 11.🔗 Series or parallel circuit: “many paths for current”? (a) parallel (b) series
12. 12.Which of these is not safe? (a) use small battery cells (b) take cells out after use (c) poke things in a socket (d) stop if a part gets hot
13. 13.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
14. 14.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
15. 15.Which of these is not safe? (a) touch a switch when wet (b) stay away from pylons (c) fly kites in open fields (d) keep drinks far away
16. 16.Which of these gives us electricity? (a) an air conditioner (b) a wind turbine (c) a mobile phone (d) a water pump
17. 17.🔋 Does a refrigerator give electricity or use electricity? (a) gives electricity (b) uses electricity
18. 18.✏️ In a circuit diagram, which part is drawn as a circle with A inside? (a) junction (b) cell (c) voltmeter (d) ammeter
19. 19.Which of these mainly makes sound? (a) a doorbell (b) a night lamp (c) a torch (d) an electric iron
20. 20.🔍 Which is the odd one out? (a) a cotton thread (b) aluminium foil (c) a plastic straw (d) a paper strip
21. 21.What does a tilt switch do? (a) slides side to side (b) closes when tipped over (c) stays where you flip it (d) springs back when let go
22. 22.⚡ What does a tube light mainly change electricity into? (a) sound (b) movement (c) light (d) heat
23. 23.✏️ In a circuit diagram, wires are usually drawn as … (a) dotted circles (b) wavy lines (c) straight lines (d) little stars
24. 24.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) switch (b) cell (c) battery (d) wire
25. 25.Which of these gives us electricity? (a) a washing machine (b) a bicycle dynamo (c) an air conditioner (d) a television
26. 26.🔋 What should you do with used-up cells? (a) give them for recycling (b) cut them open (c) throw them in a fire (d) bury them in soil
27. 27.🔍 Which is the odd one out? (a) a brass key (b) a plastic ruler (c) a plastic straw (d) a paper strip
28. 28.True or false: a ceiling fan mainly makes sound. (a) True (b) False
29. 29.💡 Why is house wiring done in parallel? (a) to save copper only (b) so all go off together (c) to make bulbs dim (d) each gets full voltage
30. 30.🔘 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 OFF and C is ON. Does the bulb glow? (a) No (b) Yes
31. 31.Which drawing is the symbol for a cell? (a) one tall, one short bar (b) triangle against a bar (c) a circle with M inside (d) a plain rectangle
32. 32.⚡ What does an electric kettle mainly change electricity into? (a) sound (b) light (c) heat (d) movement
33. 33.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
34. 34.💡 A battery lights 2 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
35. 35.⚡ What does an electric drill mainly change electricity into? (a) light (b) sound (c) heat (d) movement
36. 36.⚡ What does an electric toy car mainly change electricity into? (a) light (b) heat (c) sound (d) movement
37. 37.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) True (b) False
38. 38.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
39. 39.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they keep glowing (c) they explode (d) they get dimmer
40. 40.What does a reed switch do? (a) closes near a magnet (b) works only while pressed (c) stays where you flip it (d) springs back when let go

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