Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 434 · 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 9 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
2. 2.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) chemical energy (b) movement energy (c) sound energy (d) light energy
3. 3.🔌 Is a graphite rod a conductor or an insulator? (a) a conductor (b) an insulator
4. 4.Which of these is true of a series circuit? (a) used in house wiring (b) one bulb out, all go out (c) own switch for each bulb (d) many paths for current
5. 5.🔌 Which metal is used for most electric wires at home? (a) glass (b) plastic (c) copper (d) rubber
6. 6.Which of these is safe? (a) take cells out after use (b) use a cable with cuts (c) touch a fallen wire (d) touch a switch when wet
7. 7.True or false: a safety pin is an insulator. (a) True (b) False
8. 8.💡 6 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
9. 9.🔌 Is a plastic straw a conductor or an insulator? (a) a conductor (b) an insulator
10. 10.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they keep glowing (c) they explode (d) they get dimmer
11. 11.🔦 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 woollen thread. Does the bulb glow? (a) No (b) Yes
12. 12.🔘 What does a switch do in a circuit? (a) changes the voltage (b) stores current (c) makes electricity (d) opens or closes the loop
13. 13.🔍 Which is the odd one out? (a) build with an adult near (b) use a cable with cuts (c) dry your hands first (d) fly kites in open fields
14. 14.Which of these mainly gives out heat? (a) an electric toy car (b) a night lamp (c) a room heater (d) a traffic signal
15. 15.True or false: a rubber eraser is an insulator. (a) False (b) True
16. 16.⚠️ Is it safe to use mains for a project? (a) safe (b) not safe
17. 17.Which of these gives us electricity? (a) an air conditioner (b) a television (c) a solar panel (d) a computer
18. 18.✏️ In a circuit diagram, wires are usually drawn as … (a) wavy lines (b) little stars (c) dotted circles (d) straight lines
19. 19.✏️ In a circuit diagram, which part is drawn as a straight line? (a) voltmeter (b) wire (c) switch (d) ammeter
20. 20.💡 2 identical bulbs are joined in series with a 6 V battery (ideal wires). How many volts does each bulb get? =
21. 21.🔋 3 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)? =
22. 22.🔦 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
23. 23.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
24. 24.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) pull them by the hand (b) pour water on them (c) wait and watch (d) shout for an adult
25. 25.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
26. 26.🔘 Which kind of switch stays where you flip it? (a) a push button (b) a tilt switch (c) a toggle switch (d) a slide switch
27. 27.True or false: on a cell, “the flat end” means the + (positive) end. (a) True (b) False
28. 28.Which of these means the circuit is closed? (a) a wire has come loose (b) the bulb is unscrewed (c) a cell is taken out (d) the loop is complete
29. 29.Which of these mainly gives out light? (a) an electric drill (b) a toaster (c) a street light (d) a water heater
30. 30.⚠️ Is it safe to use a cable with cuts? (a) safe (b) not safe
31. 31.Which of these is not safe? (a) dry your hands first (b) build with an adult near (c) throw cells in a fire (d) keep drinks far away
32. 32.🔘 A bulb and a cell are joined through 3 switches on 3 side-by-side paths, one switch on each path (parallel). What is the smallest number of switches that must be ON to light the bulb?
33. 33.🔘 Which kind of switch flips up or down? (a) a slide switch (b) a push button (c) a tilt switch (d) a toggle switch
34. 34.🔍 Which is the odd one out? (a) throw cells in a fire (b) take cells out after use (c) fly a kite near wires (d) use a cable with cuts
35. 35.🔍 Which is the odd one out? (a) an iron nail (b) a brass key (c) aluminium foil (d) a cotton thread
36. 36.🔦 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 aluminium foil. Does the bulb glow? (a) Yes (b) No
37. 37.Which of these is safe? (a) stay away from pylons (b) climb an electric pole (c) touch a switch when wet (d) poke things in a socket
38. 38.🔌 Why are electric wires covered in plastic? (a) plastic makes current (b) to make them heavy (c) plastic is a conductor (d) plastic is an insulator
39. 39.⚡ Which tiny particles drift along a metal wire to carry the current? (a) water drops (b) photons (c) dust particles (d) electrons
40. 40.True or false: to build with an adult near is safe. (a) True (b) False

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