Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 756 · 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 toggle switch slides side to side. (a) False (b) True
2. 2.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) closed (b) open
3. 3.⚡ What does a mixer grinder mainly change electricity into? (a) light (b) sound (c) heat (d) movement
4. 4.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. How many bulbs glow?
5. 5.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
6. 6.🔍 Which is the odd one out? (a) stay away from pylons (b) fly a kite near wires (c) throw cells in a fire (d) poke things in a socket
7. 7.Which of these is an insulator? (a) a metal paper clip (b) an iron nail (c) a rubber band (d) a brass key
8. 8.What does a tilt switch do? (a) closes when tipped over (b) flips up or down (c) springs back when let go (d) slides side to side
9. 9.Which of these means the circuit is closed? (a) the bulb is unscrewed (b) a cell is taken out (c) the switch is ON (d) a wire is cut
10. 10.⚡ What does a table fan mainly change electricity into? (a) sound (b) movement (c) heat (d) light
11. 11.🔍 Which is the odd one out? (a) a buzzer (b) a ceiling fan (c) an electric toy car (d) an electric drill
12. 12.🔦 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) No (b) Yes
13. 13.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) False (b) True
14. 14.⚠️ Is it safe to fly a kite near wires? (a) safe (b) not safe
15. 15.🔋 A 9 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
16. 16.💡 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
17. 17.True or false: a dot where wires meet is the symbol for a junction. (a) False (b) True
18. 18.⚠️ About how many volts do home sockets in India supply? (a) 12 V (b) 1.5 V (c) 230 V (d) 9 V
19. 19.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
20. 20.🔋 6 identical 1.2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
21. 21.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) a single current path (c) one out, the rest glow (d) one bulb out, all go out
22. 22.💡 Why is house wiring done in parallel? (a) to save copper only (b) so all go off together (c) to make bulbs dim (d) each gets full voltage
23. 23.🔋 Does a washing machine give electricity or use electricity? (a) uses electricity (b) gives electricity
24. 24.🔍 Which is the odd one out? (a) a torch (b) a tube light (c) an LED lamp (d) a toaster
25. 25.Which of these is a conductor? (a) an iron nail (b) a glass marble (c) a plastic ruler (d) a woollen thread
26. 26.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) True (b) False
27. 27.Which drawing is the symbol for a voltmeter? (a) two equal parallel lines (b) a circle with A inside (c) a circle with V inside (d) a dot where wires meet
28. 28.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
29. 29.⚠️ Is it safe to stop if a part gets hot? (a) not safe (b) safe
30. 30.⚠️ Is it safe to use mains for a project? (a) safe (b) not safe
31. 31.🔍 Which is the odd one out? (a) stay away from pylons (b) use mains for a project (c) keep drinks far away (d) dry your hands first
32. 32.Which of these gives us electricity? (a) a mobile phone (b) a refrigerator (c) a bicycle dynamo (d) a computer
33. 33.Which of these is an insulator? (a) a brass key (b) a steel coin (c) a cotton thread (d) a safety pin
34. 34.💡 2 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. How many bulbs glow?
35. 35.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) True (b) False
36. 36.🔋 How many 2 V cells must be joined in series to give 16 V?
37. 37.True or false: two or more cell symbols is the symbol for a battery. (a) True (b) False
38. 38.⚡ Which tiny particles drift along a metal wire to carry the current? (a) dust particles (b) water drops (c) photons (d) electrons
39. 39.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a ceramic cup across the gap. Does the bulb glow? (a) Yes (b) No
40. 40.Which of these means the circuit is closed? (a) a cell is taken out (b) all wires are joined (c) a wire is cut (d) the bulb is unscrewed

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