Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 268 · 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.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is ON and B is OFF. Does the bulb glow? (a) No (b) Yes
2. 2.🔍 Which is the odd one out? (a) a toaster (b) a room heater (c) a torch (d) an electric iron
3. 3.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a plastic ruler across the gap. Does the bulb glow? (a) Yes (b) No
4. 4.Which of these is true of a series circuit? (a) own switch for each bulb (b) each gets the full volts (c) used in house wiring (d) a break stops every bulb
5. 5.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) bulb (b) battery (c) wire (d) junction
6. 6.Which of these is an insulator? (a) a brass key (b) a rubber band (c) an iron nail (d) a graphite rod
7. 7.Which of these uses electricity? (a) a power station (b) a mobile phone (c) a cell (d) a bicycle dynamo
8. 8.🔁 Is the circuit closed or open if a cell is taken out? (a) closed (b) open
9. 9.💡 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
10. 10.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
11. 11.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
12. 12.🔌 Which metal is used for most electric wires at home? (a) copper (b) glass (c) rubber (d) plastic
13. 13.⚡ What does a night lamp mainly change electricity into? (a) heat (b) sound (c) movement (d) light
14. 14.🔦 A circuit has a used-up (dead) cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
15. 15.🔋 5 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)? =
16. 16.⚡ A cell changes stored chemical energy into which kind of energy? (a) sound energy (b) nuclear energy (c) wind energy (d) electrical energy
17. 17.⚠️ Is it safe to touch a fallen wire? (a) not safe (b) safe
18. 18.Which of these is a conductor? (a) a brass key (b) a wooden stick (c) a rubber band (d) a plastic straw
19. 19.True or false: on a cell, “the flat end” means the + (positive) end. (a) True (b) False
20. 20.Which of these means the circuit is open? (a) the loop is complete (b) all wires are joined (c) a wire has come loose (d) the switch is ON
21. 21.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) not joined (c) in series (d) by Wi-Fi
22. 22.True or false: if all wires are joined, the circuit is open and no current flows. (a) True (b) False
23. 23.🔋 Does a water pump give electricity or use electricity? (a) uses electricity (b) gives electricity
24. 24.🔋 A 3 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
25. 25.Which of these gives us electricity? (a) a computer (b) a refrigerator (c) a power station (d) an air conditioner
26. 26.🔦 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 graphite rod. Does the bulb glow? (a) No (b) Yes
27. 27.Which of these gives us electricity? (a) a television (b) a computer (c) a mobile phone (d) a wind turbine
28. 28.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
29. 29.⚠️ Who should be with you when you build a circuit? (a) a younger child (b) a trusted adult (c) nobody (d) a stranger online
30. 30.🔁 Is the circuit closed or open if a wire has come loose? (a) open (b) closed
31. 31.🔍 Which is the odd one out? (a) a wooden stick (b) a glass marble (c) a copper wire (d) a dry cork
32. 32.✏️ In a circuit diagram, which part is drawn as a plain rectangle? (a) resistor (b) battery (c) LED (d) cell
33. 33.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) one bulb out, all go out (c) own switch for each bulb (d) a break stops every bulb
34. 34.Which of these uses electricity? (a) a solar panel (b) a bicycle dynamo (c) a cell (d) a washing machine
35. 35.True or false: a siren mainly gives out light. (a) True (b) False
36. 36.⚠️ About how many volts do home sockets in India supply? (a) 9 V (b) 230 V (c) 12 V (d) 1.5 V
37. 37.🔍 Which is the odd one out? (a) stay away from pylons (b) build with an adult near (c) use small battery cells (d) open a phone charger
38. 38.True or false: a torch mainly gives out light. (a) False (b) True
39. 39.True or false: to stay away from pylons is safe. (a) False (b) True
40. 40.⚠️ Which power source should children use for electronics projects? (a) a mains extension board (b) a small battery pack (c) a wall socket (d) an inverter socket

Free electronics lessons, practice and worksheets at talentjr.in/electronics-for-kids