Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 893 · 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.🔍 Which is the odd one out? (a) a brass key (b) a rubber eraser (c) aluminium foil (d) a graphite rod
2. 2.Which of these mainly makes sound? (a) an electric toy car (b) a tube light (c) a traffic signal (d) a loudspeaker
3. 3.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a rubber band across the gap. Does the bulb glow? (a) No (b) Yes
4. 4.🔋 What should you do with used-up cells? (a) bury them in soil (b) cut them open (c) throw them in a fire (d) give them for recycling
5. 5.True or false: to stay away from pylons is not safe. (a) False (b) True
6. 6.💡 4 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?
7. 7.🔌 Is an iron nail a conductor or an insulator? (a) an insulator (b) a conductor
8. 8.✏️ In a circuit diagram, wires are usually drawn as … (a) dotted circles (b) wavy lines (c) little stars (d) straight lines
9. 9.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) none (b) it does not matter (c) only one (d) both of them
10. 10.🔍 Which is the odd one out? (a) a woollen thread (b) a brass key (c) a copper wire (d) a metal paper clip
11. 11.⚠️ About how many volts do home sockets in India supply? (a) 1.5 V (b) 9 V (c) 230 V (d) 12 V
12. 12.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
13. 13.True or false: “many paths for current” is true of a parallel circuit. (a) True (b) False
14. 14.What does a reed switch do? (a) slides side to side (b) closes near a magnet (c) flips up or down (d) closes when tipped over
15. 15.⚠️ Is it safe to dry your hands first? (a) not safe (b) safe
16. 16.Which of these mainly makes movement? (a) a ceiling fan (b) a tube light (c) a street light (d) a rice cooker
17. 17.True or false: a copper wire is an insulator. (a) False (b) True
18. 18.True or false: triangle against a bar is the symbol for a diode. (a) True (b) False
19. 19.🔋 A 3 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
20. 20.🔘 A cell and a bulb are joined to two side-by-side paths: path 1 has switches A and B one after another, path 2 has switch C. A is OFF, B is ON and C is OFF. Does the bulb glow? (a) Yes (b) No
21. 21.True or false: a reed switch closes near a magnet. (a) True (b) False
22. 22.Which of these is an insulator? (a) a metal paper clip (b) a copper wire (c) a steel spoon (d) a paper strip
23. 23.🔦 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) No (b) Yes
24. 24.✏️ In a circuit diagram, which part is drawn as a circle with an X in it? (a) ammeter (b) LED (c) junction (d) bulb
25. 25.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) ammeter (b) cell (c) junction (d) capacitor
26. 26.⚡ A fan changes electrical energy mainly into which kind of energy? (a) movement energy (b) light energy (c) chemical energy (d) sound energy
27. 27.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) none (c) one (d) two
28. 28.Which of these is a conductor? (a) a plastic straw (b) an iron nail (c) a plastic ruler (d) a ceramic cup
29. 29.🔍 Which is the odd one out? (a) a rubber eraser (b) a plastic straw (c) a rubber band (d) an iron nail
30. 30.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) by Wi-Fi (c) not joined (d) in series
31. 31.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. A gap in one wire is bridged by a plastic ruler. Does the bulb glow? (a) No (b) Yes
32. 32.💡 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
33. 33.🔌 Is a copper wire a conductor or an insulator? (a) an insulator (b) a conductor
34. 34.Which of these is a conductor? (a) a paper strip (b) a dry cork (c) a rubber band (d) a graphite rod
35. 35.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
36. 36.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) chemical energy (b) light energy (c) movement energy (d) sound energy
37. 37.🔗 Series or parallel circuit: “a break stops every bulb”? (a) parallel (b) series
38. 38.Which of these gives us electricity? (a) a washing machine (b) a computer (c) a solar panel (d) a refrigerator
39. 39.🔍 Which is the odd one out? (a) an electric kettle (b) a night lamp (c) a traffic signal (d) an LED lamp
40. 40.Which of these is not safe? (a) keep drinks far away (b) build with an adult near (c) stay away from pylons (d) touch a switch when wet

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