Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 518 · 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.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they keep glowing (c) they get dimmer (d) they explode
2. 2.Which of these is a conductor? (a) a paper strip (b) a brass key (c) a ceramic cup (d) a woollen thread
3. 3.🔌 Why are electric wires covered in plastic? (a) to make them heavy (b) plastic makes current (c) plastic is a conductor (d) plastic is an insulator
4. 4.Which of these means the circuit is open? (a) the switch is ON (b) all wires are joined (c) the loop is complete (d) the switch is OFF
5. 5.🔌 Most metals are good … (a) magnets only (b) insulators (c) batteries (d) conductors
6. 6.Which of these is not safe? (a) build with an adult near (b) use small battery cells (c) take cells out after use (d) touch a switch when wet
7. 7.🔌 Is a glass marble a conductor or an insulator? (a) a conductor (b) an insulator
8. 8.🔋 How many 3 V cells must be joined in series to give 6 V?
9. 9.Which of these means the circuit is closed? (a) a wire is cut (b) a wire has come loose (c) the switch is OFF (d) the switch is ON
10. 10.💡 5 identical bulbs are in parallel and each bulb has its own switch on its path. 2 of the switches are OFF and the rest are ON. How many bulbs glow?
11. 11.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) both lines (c) the longer line (d) neither line
12. 12.🔍 Which is the odd one out? (a) a plastic ruler (b) a copper wire (c) a steel spoon (d) a metal paper clip
13. 13.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) switch (b) ammeter (c) battery (d) motor
14. 14.🔌 Is a paper strip a conductor or an insulator? (a) a conductor (b) an insulator
15. 15.True or false: a long and a short line is the symbol for a wire. (a) False (b) True
16. 16.Which of these mainly makes movement? (a) a school bell (b) a loudspeaker (c) a water heater (d) a table fan
17. 17.🔌 Is aluminium foil a conductor or an insulator? (a) a conductor (b) an insulator
18. 18.True or false: a woollen thread is a conductor. (a) False (b) True
19. 19.🔘 A bulb and a cell are joined through 3 switches on 3 side-by-side paths, one switch on each path (parallel). What is the smallest number of switches that must be ON to light the bulb?
20. 20.Which of these is true of a series circuit? (a) one out, the rest glow (b) each gets the full volts (c) many paths for current (d) one bulb out, all go out
21. 21.✏️ Why do engineers draw circuits with symbols? (a) symbols are heavier (b) quick and clear for all (c) to make it colourful (d) to hide the circuit
22. 22.Which of these gives us electricity? (a) a washing machine (b) a water pump (c) a television (d) a battery
23. 23.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) series (b) parallel
24. 24.🔌 Is a rubber eraser a conductor or an insulator? (a) a conductor (b) an insulator
25. 25.Which of these gives us electricity? (a) a water pump (b) a refrigerator (c) a television (d) a cell
26. 26.⚠️ About how many volts do home sockets in India supply? (a) 1.5 V (b) 9 V (c) 230 V (d) 12 V
27. 27.True or false: to throw cells in a fire is safe. (a) False (b) True
28. 28.💡 3 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. How many bulbs glow?
29. 29.✏️ In a circuit diagram, which part is drawn as a line lifted at a gap? (a) wire (b) bulb (c) motor (d) switch
30. 30.🔘 When a switch is ON, the circuit is … (a) cut (b) broken (c) closed (d) open
31. 31.🔍 Which is the odd one out? (a) a copper wire (b) a brass key (c) a dry cork (d) a steel coin
32. 32.⚡ What does a mixer grinder mainly change electricity into? (a) movement (b) light (c) heat (d) sound
33. 33.⚠️ Is it safe to fly kites in open fields? (a) not safe (b) safe
34. 34.🔍 Which is the odd one out? (a) a loudspeaker (b) a siren (c) a doorbell (d) a tube light
35. 35.True or false: a toggle switch closes near a magnet. (a) False (b) True
36. 36.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
37. 37.True or false: a push button springs back when let go. (a) False (b) True
38. 38.💡 3 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
39. 39.🔋 Does a solar panel give electricity or use electricity? (a) gives electricity (b) uses electricity
40. 40.🔁 Is the circuit closed or open if a wire is cut? (a) closed (b) open

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