Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 975 · 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.⚠️ Is it safe to keep drinks far away? (a) safe (b) not safe
2. 2.Which of these is safe? (a) poke things in a socket (b) use mains for a project (c) climb an electric pole (d) use small battery cells
3. 3.🔋 A 9 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
4. 4.Which of these means the circuit is closed? (a) a wire has come loose (b) a cell is taken out (c) the switch is OFF (d) the loop is complete
5. 5.🔦 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
6. 6.🔋 Cells joined + to − in a row (series) give … (a) the same voltage (b) a bigger voltage (c) a smaller voltage (d) no voltage
7. 7.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
8. 8.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) voltmeter (b) junction (c) switch (d) bulb
9. 9.Which of these uses electricity? (a) a battery (b) a power station (c) a solar panel (d) a refrigerator
10. 10.True or false: a circle with M inside is the symbol for a motor. (a) False (b) True
11. 11.Which of these mainly makes movement? (a) a traffic signal (b) a room heater (c) a mixer grinder (d) a school bell
12. 12.True or false: a toggle switch flips up or down. (a) True (b) False
13. 13.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
14. 14.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) in parallel (c) in series (d) not joined
15. 15.🔍 Which is the odd one out? (a) an electric kettle (b) a room heater (c) a school bell (d) an electric iron
16. 16.Which of these mainly gives out light? (a) an exhaust fan (b) a street light (c) a water heater (d) a rice cooker
17. 17.🔋 6 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
18. 18.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
19. 19.🔁 Is the circuit closed or open if all wires are joined? (a) closed (b) open
20. 20.⚠️ Is it safe to take cells out after use? (a) safe (b) not safe
21. 21.🔘 Which kind of switch slides side to side? (a) a toggle switch (b) a reed switch (c) a slide switch (d) a push button
22. 22.💡 2 identical bulbs are joined in series with a 2 V battery (ideal wires). How many volts does each bulb get? =
23. 23.🔋 8 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)? =
24. 24.True or false: a ceiling fan mainly gives out heat. (a) False (b) True
25. 25.True or false: a paper strip is an insulator. (a) True (b) False
26. 26.💡 In a series circuit, how many paths does the current have? (a) none (b) two (c) one (d) one for each bulb
27. 27.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is OFF and B is ON. Does the bulb glow? (a) Yes (b) No
28. 28.🔋 Does a mobile phone give electricity or use electricity? (a) uses electricity (b) gives electricity
29. 29.🔍 Which is the odd one out? (a) a copper wire (b) a wooden stick (c) a paper strip (d) a woollen thread
30. 30.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) False (b) True
31. 31.True or false: a tilt switch works only while pressed. (a) False (b) True
32. 32.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) LED (b) wire (c) voltmeter (d) cell
33. 33.🔍 Which is the odd one out? (a) dry your hands first (b) throw cells in a fire (c) open a phone charger (d) climb an electric pole
34. 34.True or false: a metal paper clip is an insulator. (a) True (b) False
35. 35.⚠️ About how many volts do home sockets in India supply? (a) 12 V (b) 1.5 V (c) 9 V (d) 230 V
36. 36.🔗 Series or parallel circuit: “own switch for each bulb”? (a) parallel (b) series
37. 37.🔌 Why are electric wires covered in plastic? (a) plastic is an insulator (b) plastic is a conductor (c) to make them heavy (d) plastic makes current
38. 38.True or false: a steel spoon is an insulator. (a) False (b) True
39. 39.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they all go out (c) they explode (d) they keep glowing
40. 40.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. Does bulb 3 glow? (a) Yes (b) No

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