Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 523 · 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: to fly a kite near wires is not safe. (a) True (b) False
2. 2.True or false: a circle with a cross is the symbol for a resistor. (a) False (b) True
3. 3.⚠️ Is it safe to use mains for a project? (a) safe (b) not safe
4. 4.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
5. 5.True or false: if all wires are joined, the circuit is open and no current flows. (a) True (b) False
6. 6.What does a tilt switch do? (a) closes when tipped over (b) closes near a magnet (c) springs back when let go (d) stays where you flip it
7. 7.True or false: a glass marble is an insulator. (a) False (b) True
8. 8.🔌 Is a cotton thread a conductor or an insulator? (a) an insulator (b) a conductor
9. 9.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
10. 10.🔘 Which kind of switch stays where you flip it? (a) a toggle switch (b) a tilt switch (c) a push button (d) a reed switch
11. 11.Which of these is true of a series circuit? (a) many paths for current (b) bulbs share the voltage (c) own switch for each bulb (d) each gets the full volts
12. 12.Which of these means the circuit is closed? (a) all wires are joined (b) the switch is OFF (c) a wire is cut (d) the bulb is unscrewed
13. 13.True or false: to touch a fallen wire is safe. (a) False (b) True
14. 14.⚠️ About how many volts do home sockets in India supply? (a) 12 V (b) 9 V (c) 1.5 V (d) 230 V
15. 15.Which of these means the circuit is closed? (a) the bulb is unscrewed (b) a wire has come loose (c) a cell is taken out (d) the loop is complete
16. 16.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) True (b) False
17. 17.🔍 Which is the odd one out? (a) a woollen thread (b) a brass key (c) an iron nail (d) aluminium foil
18. 18.🔘 Which kind of switch flips up or down? (a) a slide switch (b) a push button (c) a reed switch (d) a toggle switch
19. 19.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
20. 20.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
21. 21.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is OFF, B is ON, C is OFF and D is ON. Does the bulb glow? (a) No (b) Yes
22. 22.🔗 Series or parallel circuit: “one out, the rest glow”? (a) parallel (b) series
23. 23.💡 3 identical bulbs are in parallel and each bulb has its own switch on its path. 1 of the switches is OFF and the rest are ON. How many bulbs glow?
24. 24.🔘 A cell and a bulb are joined to 2 side-by-side paths with one switch on each path — A and B (parallel). A is ON and B is OFF. Does the bulb glow? (a) Yes (b) No
25. 25.Which of these uses electricity? (a) a solar panel (b) a power station (c) a cell (d) a television
26. 26.🔁 Is the circuit closed or open if a cell is taken out? (a) open (b) closed
27. 27.⚠️ Who should be with you when you build a circuit? (a) a younger child (b) a trusted adult (c) nobody (d) a stranger online
28. 28.Which of these means the circuit is open? (a) the bulb is unscrewed (b) the switch is ON (c) the loop is complete (d) all wires are joined
29. 29.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) to save copper only (c) so all go off together (d) to make bulbs dim
30. 30.Which of these mainly makes sound? (a) a ceiling fan (b) a buzzer (c) a water heater (d) a rice cooker
31. 31.💡 2 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
32. 32.🔁 What must there be for a current to flow? (a) one loose end (b) a broken path (c) a complete loop (d) a plastic gap
33. 33.💡 A battery lights 2 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
34. 34.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) ammeter (b) capacitor (c) motor (d) cell
35. 35.True or false: to fly kites in open fields is safe. (a) False (b) True
36. 36.Which of these mainly gives out light? (a) a buzzer (b) a toaster (c) a siren (d) a torch
37. 37.True or false: if a wire is cut, the circuit is open and no current flows. (a) True (b) False
38. 38.🔍 Which is the odd one out? (a) a rubber band (b) a plastic ruler (c) an iron nail (d) a rubber eraser
39. 39.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) True (b) False
40. 40.🔋 7 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)? =

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