Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 666 · 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 steel coin is an insulator. (a) True (b) False
2. 2.Which of these is safe? (a) touch a switch when wet (b) keep drinks far away (c) open a phone charger (d) use mains for a project
3. 3.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is OFF, B is ON and C is OFF. Does the bulb glow? (a) Yes (b) No
4. 4.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are OFF (b) only when both are ON (c) never (d) when either is ON
5. 5.💡 Why is house wiring done in parallel? (a) to save copper only (b) to make bulbs dim (c) each gets full voltage (d) so all go off together
6. 6.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
7. 7.🔋 What is a battery? (a) one single wire (b) a kind of bulb (c) two or more cells joined (d) a switch with a lid
8. 8.Which of these is not safe? (a) touch a fallen wire (b) fly kites in open fields (c) build with an adult near (d) stay away from pylons
9. 9.🔍 Which is the odd one out? (a) touch a fallen wire (b) build with an adult near (c) dry your hands first (d) keep drinks far away
10. 10.⚠️ Who should be with you when you build a circuit? (a) nobody (b) a younger child (c) a stranger online (d) a trusted adult
11. 11.What does a toggle switch do? (a) stays where you flip it (b) closes near a magnet (c) closes when tipped over (d) slides side to side
12. 12.🔦 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 steel spoon. Does the bulb glow? (a) No (b) Yes
13. 13.💡 A battery lights 3 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
14. 14.🔁 Is the circuit closed or open if the switch is OFF? (a) closed (b) open
15. 15.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) capacitor (b) bulb (c) cell (d) motor
16. 16.Which of these mainly gives out light? (a) an electric kettle (b) a torch (c) a doorbell (d) a water heater
17. 17.Which of these is a conductor? (a) a copper wire (b) a rubber band (c) a glass marble (d) a plastic ruler
18. 18.⚠️ About how many volts do home sockets in India supply? (a) 230 V (b) 9 V (c) 12 V (d) 1.5 V
19. 19.What does a slide switch do? (a) closes near a magnet (b) stays where you flip it (c) slides side to side (d) works only while pressed
20. 20.True or false: a toaster mainly makes movement. (a) False (b) True
21. 21.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
22. 22.⚡ Which tiny particles drift along a metal wire to carry the current? (a) dust particles (b) electrons (c) water drops (d) photons
23. 23.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) closed (b) open
24. 24.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) True (b) False
25. 25.🔍 Which is the odd one out? (a) a rubber band (b) a woollen thread (c) a brass key (d) a paper strip
26. 26.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
27. 27.💡 6 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
28. 28.💡 2 identical bulbs are joined in series with a 6 V battery (ideal wires). How many volts does each bulb get? =
29. 29.🔘 Which kind of switch works only while pressed? (a) a toggle switch (b) a push button (c) a reed switch (d) a tilt switch
30. 30.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
31. 31.True or false: a steel coin is a conductor. (a) False (b) True
32. 32.Which of these mainly gives out heat? (a) an exhaust fan (b) an electric iron (c) a night lamp (d) a school bell
33. 33.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) parallel (b) series
34. 34.What does a push button do? (a) closes when tipped over (b) closes near a magnet (c) stays where you flip it (d) works only while pressed
35. 35.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is ON, B is OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
36. 36.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) chemical energy (b) light energy (c) sound energy (d) movement energy
37. 37.⚠️ Is it safe to fly a kite near wires? (a) not safe (b) safe
38. 38.True or false: a mixer grinder mainly makes movement. (a) True (b) False
39. 39.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) capacitor (b) LED (c) battery (d) switch
40. 40.⚡ A solar panel changes which kind of energy into electricity? (a) sound energy (b) chemical energy (c) wind energy (d) light energy

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