Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 996 · 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: a room heater mainly gives out heat. (a) False (b) True
2. 2.True or false: if the bulb is unscrewed, the circuit is closed and current flows. (a) False (b) True
3. 3.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
4. 4.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a single current path (c) each gets the full volts (d) a break stops every bulb
5. 5.True or false: a torch mainly gives out light. (a) False (b) True
6. 6.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) open (b) closed
7. 7.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) motor (b) junction (c) bulb (d) voltmeter
8. 8.True or false: a toggle switch stays where you flip it. (a) False (b) True
9. 9.💡 5 identical bulbs are joined in parallel (each on its own side-by-side path) with a battery and a closed switch on the main wire. Bulbs 1 and 2 are taken out of their holders. Does bulb 3 glow? (a) No (b) Yes
10. 10.Which of these is not safe? (a) poke things in a socket (b) stop if a part gets hot (c) stay away from pylons (d) take cells out after use
11. 11.True or false: if a cell is taken out, the circuit is closed and current flows. (a) True (b) False
12. 12.💡 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
13. 13.Which of these gives us electricity? (a) a refrigerator (b) a solar panel (c) an air conditioner (d) a mobile phone
14. 14.🔋 7 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
15. 15.True or false: a siren mainly gives out heat. (a) False (b) True
16. 16.🔍 Which is the odd one out? (a) an iron nail (b) a woollen thread (c) a safety pin (d) a steel coin
17. 17.💡 5 identical bulbs are joined in series with a 15 V battery (ideal wires). How many volts does each bulb get? =
18. 18.True or false: a traffic signal mainly makes sound. (a) False (b) True
19. 19.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
20. 20.🔍 Which is the odd one out? (a) a ceiling fan (b) an exhaust fan (c) an electric iron (d) an electric drill
21. 21.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
22. 22.Which of these mainly gives out heat? (a) a buzzer (b) an exhaust fan (c) a toaster (d) a torch
23. 23.🔋 Does an air conditioner give electricity or use electricity? (a) uses electricity (b) gives electricity
24. 24.True or false: a rubber eraser is an insulator. (a) False (b) True
25. 25.True or false: a rubber eraser is a conductor. (a) False (b) True
26. 26.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) True (b) False
27. 27.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 5 is taken out of its holder. Does bulb 2 glow? (a) No (b) Yes
28. 28.✏️ Why do engineers draw circuits with symbols? (a) to make it colourful (b) quick and clear for all (c) symbols are heavier (d) to hide the circuit
29. 29.True or false: to use small battery cells is safe. (a) True (b) False
30. 30.True or false: “many paths for current” is true of a series circuit. (a) True (b) False
31. 31.🔍 Which is the odd one out? (a) a water heater (b) a traffic signal (c) a toaster (d) a rice cooker
32. 32.🔘 A cell and a bulb are joined to 4 side-by-side paths with one switch on each path — A, B, C and D (parallel). A is ON, B is ON, C is ON and D is ON. Does the bulb glow? (a) No (b) Yes
33. 33.Which of these gives us electricity? (a) a cell (b) a washing machine (c) a computer (d) a water pump
34. 34.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they explode (c) they keep glowing (d) they get dimmer
35. 35.✏️ In a circuit diagram, which part is drawn as a circle with A inside? (a) resistor (b) switch (c) diode (d) ammeter
36. 36.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
37. 37.💡 A battery lights 2 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
38. 38.Which of these mainly gives out light? (a) an LED lamp (b) an electric iron (c) a toaster (d) an electric kettle
39. 39.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a wooden stick across the gap. Does the bulb glow? (a) No (b) Yes
40. 40.💡 A battery lights 5 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

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