Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 780 · 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: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
2. 2.🔍 Which is the odd one out? (a) a plastic ruler (b) a glass marble (c) a metal paper clip (d) a dry cork
3. 3.True or false: “a single current path” is true of a series circuit. (a) True (b) False
4. 4.⚠️ About how many volts do home sockets in India supply? (a) 230 V (b) 1.5 V (c) 9 V (d) 12 V
5. 5.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) cell (b) battery (c) resistor (d) motor
6. 6.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a brass key. Does the bulb glow? (a) No (b) Yes
7. 7.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) light energy (b) movement energy (c) chemical energy (d) sound energy
8. 8.🔘 Which kind of switch slides side to side? (a) a toggle switch (b) a reed switch (c) a slide switch (d) a tilt switch
9. 9.🔗 Series or parallel circuit: “a break stops every bulb”? (a) parallel (b) series
10. 10.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) the longer line (c) neither line (d) both lines
11. 11.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
12. 12.True or false: a toggle switch closes near a magnet. (a) True (b) False
13. 13.🔍 Which is the odd one out? (a) stay away from pylons (b) climb an electric pole (c) use a cable with cuts (d) poke things in a socket
14. 14.🔌 Is aluminium foil a conductor or an insulator? (a) a conductor (b) an insulator
15. 15.🔍 Which is the odd one out? (a) a graphite rod (b) aluminium foil (c) a plastic ruler (d) a brass key
16. 16.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) dotted circles (c) straight lines (d) wavy lines
17. 17.💡 2 identical bulbs are joined in series with a 3 V battery (ideal wires). How many volts does each bulb get? =
18. 18.💡 A battery lights 3 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
19. 19.🔌 Most metals are good … (a) insulators (b) batteries (c) magnets only (d) conductors
20. 20.💡 2 identical bulbs are joined in series with an 8 V battery (ideal wires). How many volts does each bulb get? =
21. 21.Which of these is true of a series circuit? (a) one out, the rest glow (b) a single current path (c) own switch for each bulb (d) many paths for current
22. 22.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) to save copper only (c) so all go off together (d) each gets full voltage
23. 23.🔋 Does a solar panel give electricity or use electricity? (a) uses electricity (b) gives electricity
24. 24.What does a slide switch do? (a) slides side to side (b) closes when tipped over (c) springs back when let go (d) flips up or down
25. 25.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by an iron nail. Does the bulb glow? (a) No (b) Yes
26. 26.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) cell (b) voltmeter (c) diode (d) battery
27. 27.💡 5 identical bulbs are joined in series with a 7.5 V battery (ideal wires). How many volts does each bulb get? =
28. 28.💡 3 identical bulbs are joined in series with a 4.5 V battery (ideal wires). How many volts does each bulb get? =
29. 29.⚡ What does a doorbell mainly change electricity into? (a) heat (b) sound (c) movement (d) light
30. 30.🔌 A gap of dry air between two wires acts as … (a) a cell (b) a switch that is ON (c) a conductor (d) an insulator
31. 31.🔌 Which part of a screwdriver should an electrician hold? (a) the plastic handle (b) the steel shaft (c) the bare end (d) the metal tip
32. 32.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
33. 33.True or false: a toggle switch closes when tipped over. (a) True (b) False
34. 34.Which of these mainly makes movement? (a) a street light (b) a school bell (c) an electric drill (d) a siren
35. 35.🔘 Which kind of switch closes near a magnet? (a) a push button (b) a slide switch (c) a reed switch (d) a tilt switch
36. 36.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a bulb (b) a plug top (c) a fuse or MCB (d) a long wire
37. 37.⚠️ Is it safe to use small battery cells? (a) not safe (b) safe
38. 38.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) in series (c) not joined (d) by Wi-Fi
39. 39.🔍 Which is the odd one out? (a) an electric iron (b) a street light (c) a torch (d) a traffic signal
40. 40.🔁 Is the circuit closed or open if all wires are joined? (a) closed (b) open

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