Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 993 · 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.💡 6 identical bulbs are in parallel and each bulb has its own switch on its path. 4 of the switches are OFF and the rest are ON. How many bulbs glow?
2. 2.True or false: to fly kites in open fields is safe. (a) True (b) False
3. 3.True or false: on a cell, “the flat end” means the + (positive) end. (a) True (b) False
4. 4.⚠️ Who should be with you when you build a circuit? (a) a trusted adult (b) a stranger online (c) a younger child (d) nobody
5. 5.Which of these uses electricity? (a) a cell (b) a solar panel (c) a power station (d) a computer
6. 6.Which of these uses electricity? (a) a solar panel (b) a power station (c) a cell (d) a washing machine
7. 7.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) open (b) closed
8. 8.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
9. 9.🔌 A gap of dry air between two wires acts as … (a) a cell (b) an insulator (c) a switch that is ON (d) a conductor
10. 10.Which of these means the circuit is closed? (a) the switch is ON (b) the switch is OFF (c) a cell is taken out (d) a wire has come loose
11. 11.Which of these is an insulator? (a) a safety pin (b) an iron nail (c) a steel coin (d) a plastic straw
12. 12.💡 5 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. Does bulb 5 glow? (a) No (b) Yes
13. 13.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) wavy lines (c) dotted circles (d) straight lines
14. 14.True or false: a steel spoon is a conductor. (a) False (b) True
15. 15.⚡ What does a torch mainly change electricity into? (a) heat (b) sound (c) light (d) movement
16. 16.🔌 Is a rubber band a conductor or an insulator? (a) a conductor (b) an insulator
17. 17.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. Does the bulb glow? (a) No (b) Yes
18. 18.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a long wire (b) a fuse or MCB (c) a bulb (d) a plug top
19. 19.🔦 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
20. 20.🔘 Which kind of switch springs back when let go? (a) a toggle switch (b) a push button (c) a tilt switch (d) a reed switch
21. 21.⚡ What does a siren mainly change electricity into? (a) sound (b) heat (c) movement (d) light
22. 22.🔘 When a switch is ON, the circuit is … (a) broken (b) cut (c) closed (d) open
23. 23.💡 4 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
24. 24.🔁 Is the circuit closed or open if the loop is complete? (a) open (b) closed
25. 25.💡 2 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
26. 26.⚠️ Why must we never touch switches with wet hands? (a) it is just untidy (b) water makes it cold (c) water carries current (d) it spoils the paint
27. 27.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a rubber eraser across the gap. Does the bulb glow? (a) No (b) Yes
28. 28.💡 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
29. 29.🔘 Which kind of switch stays where you flip it? (a) a toggle switch (b) a slide switch (c) a push button (d) a reed switch
30. 30.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they keep glowing (c) they all go out (d) they get dimmer
31. 31.True or false: to open a phone charger is safe. (a) False (b) True
32. 32.🔍 Which is the odd one out? (a) a doorbell (b) a siren (c) a street light (d) a loudspeaker
33. 33.True or false: a tilt switch slides side to side. (a) True (b) False
34. 34.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
35. 35.Which of these is true of a series circuit? (a) one out, the rest glow (b) used in house wiring (c) many paths for current (d) one bulb out, all go out
36. 36.🔍 Which is the odd one out? (a) touch a fallen wire (b) climb an electric pole (c) stay away from pylons (d) open a phone charger
37. 37.🔦 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
38. 38.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) pull them by the hand (b) pour water on them (c) shout for an adult (d) wait and watch
39. 39.💡 6 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
40. 40.Which of these is safe? (a) poke things in a socket (b) use mains for a project (c) keep drinks far away (d) open a phone charger

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