Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 781 · 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.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
2. 2.🔘 When a switch is ON, the circuit is … (a) broken (b) open (c) closed (d) cut
3. 3.Which of these mainly makes sound? (a) a tube light (b) an LED lamp (c) a buzzer (d) a toaster
4. 4.🔌 Is a ceramic cup a conductor or an insulator? (a) a conductor (b) an insulator
5. 5.🔌 Is a woollen thread a conductor or an insulator? (a) a conductor (b) an insulator
6. 6.🔘 Which kind of switch works only while pressed? (a) a push button (b) a tilt switch (c) a toggle switch (d) a reed switch
7. 7.True or false: to throw cells in a fire is not safe. (a) True (b) False
8. 8.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they get dimmer (c) they explode (d) they keep glowing
9. 9.🔍 Which is the odd one out? (a) a traffic signal (b) a torch (c) an LED lamp (d) a room heater
10. 10.🔌 Is a safety pin a conductor or an insulator? (a) a conductor (b) an insulator
11. 11.🔘 A bulb and a cell are joined through 3 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
12. 12.Which drawing is the symbol for a motor? (a) triangle against a bar (b) a circle with M inside (c) a plain rectangle (d) a line lifted at a gap
13. 13.Which of these mainly makes sound? (a) an electric toy car (b) a school bell (c) a water heater (d) an electric kettle
14. 14.Which of these is safe? (a) touch a switch when wet (b) open a phone charger (c) poke things in a socket (d) stop if a part gets hot
15. 15.💡 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
16. 16.🔋 How many volts does one ordinary torch cell give? (a) 0.5 V (b) 1.5 V (c) 230 V (d) 15 V
17. 17.True or false: a reed switch slides side to side. (a) True (b) False
18. 18.Which of these gives us electricity? (a) a water pump (b) an air conditioner (c) a power station (d) a television
19. 19.Which of these is safe? (a) use a cable with cuts (b) throw cells in a fire (c) touch a fallen wire (d) fly kites in open fields
20. 20.Which of these means the circuit is closed? (a) a wire is cut (b) the switch is ON (c) the switch is OFF (d) the bulb is unscrewed
21. 21.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) in series (c) by Wi-Fi (d) in parallel
22. 22.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
23. 23.True or false: one tall, one short bar is the symbol for a resistor. (a) False (b) True
24. 24.🔋 What should you do with used-up cells? (a) bury them in soil (b) cut them open (c) give them for recycling (d) throw them in a fire
25. 25.⚡ What does a tube light mainly change electricity into? (a) heat (b) movement (c) light (d) sound
26. 26.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) each gets full voltage (c) so all go off together (d) to save copper only
27. 27.Which of these gives us electricity? (a) a water pump (b) a computer (c) a generator (d) a washing machine
28. 28.⚡ Which tiny particles drift along a metal wire to carry the current? (a) photons (b) dust particles (c) electrons (d) water drops
29. 29.🔋 Does an air conditioner give electricity or use electricity? (a) uses electricity (b) gives electricity
30. 30.💡 In a series circuit, how many paths does the current have? (a) one (b) one for each bulb (c) none (d) two
31. 31.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) switch (b) battery (c) resistor (d) cell
32. 32.Which of these is a conductor? (a) a cotton thread (b) a glass marble (c) a plastic ruler (d) a safety pin
33. 33.🔍 Which is the odd one out? (a) a wooden stick (b) a metal paper clip (c) a ceramic cup (d) a plastic ruler
34. 34.True or false: aluminium foil is a conductor. (a) False (b) True
35. 35.✏️ In a circuit diagram, wires are usually drawn as … (a) dotted circles (b) wavy lines (c) little stars (d) straight lines
36. 36.💡 4 identical bulbs are joined in series with a 4 V battery (ideal wires). How many volts does each bulb get? =
37. 37.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) capacitor (b) resistor (c) switch (d) motor
38. 38.Which of these is not safe? (a) touch a switch when wet (b) keep drinks far away (c) use small battery cells (d) stop if a part gets hot
39. 39.🔗 Series or parallel circuit: “used in house wiring”? (a) parallel (b) series
40. 40.🔍 Which is the odd one out? (a) a cotton thread (b) a steel spoon (c) a safety pin (d) a copper wire

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