Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 493 · 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.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a long wire (b) a fuse or MCB (c) a bulb (d) a plug top
2. 2.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they explode (c) they all go out (d) they keep glowing
3. 3.🔍 Which is the odd one out? (a) touch a switch when wet (b) use mains for a project (c) touch a fallen wire (d) build with an adult near
4. 4.🔌 Is a plastic straw a conductor or an insulator? (a) an insulator (b) a conductor
5. 5.True or false: on a cell, “the flat end” means the + (positive) end. (a) True (b) False
6. 6.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
7. 7.🔋 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)? =
8. 8.🔋 How many 1.2 V cells must be joined in series to give 7.2 V?
9. 9.⚡ Which tiny particles drift along a metal wire to carry the current? (a) dust particles (b) water drops (c) photons (d) electrons
10. 10.Which of these gives us electricity? (a) a solar panel (b) a water pump (c) a washing machine (d) a mobile phone
11. 11.Which of these is a conductor? (a) a wooden stick (b) a glass marble (c) a cotton thread (d) a safety pin
12. 12.⚠️ Is it safe to throw cells in a fire? (a) not safe (b) safe
13. 13.🔋 What is a battery? (a) a kind of bulb (b) two or more cells joined (c) one single wire (d) a switch with a lid
14. 14.⚠️ Is it safe to use mains for a project? (a) safe (b) not safe
15. 15.True or false: an iron nail is an insulator. (a) True (b) False
16. 16.Which of these is not safe? (a) stop if a part gets hot (b) touch a switch when wet (c) build with an adult near (d) stay away from pylons
17. 17.Which of these is a conductor? (a) a ceramic cup (b) a wooden stick (c) a plastic straw (d) a copper wire
18. 18.🔘 Two switches are in series. When does the bulb glow? (a) when both are OFF (b) when either is ON (c) never (d) when both are ON
19. 19.⚡ What does an electric drill mainly change electricity into? (a) movement (b) heat (c) light (d) sound
20. 20.Which of these is true of a series circuit? (a) one out, the rest glow (b) used in house wiring (c) one bulb out, all go out (d) each gets the full volts
21. 21.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) none (b) only one (c) it does not matter (d) both of them
22. 22.🔋 6 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)? =
23. 23.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. Does bulb 1 glow? (a) No (b) Yes
24. 24.⚠️ Is it safe to dry your hands first? (a) not safe (b) safe
25. 25.🔘 Which kind of switch closes near a magnet? (a) a toggle switch (b) a push button (c) a slide switch (d) a reed switch
26. 26.🔍 Which is the odd one out? (a) an electric toy car (b) a night lamp (c) a table fan (d) a ceiling fan
27. 27.🔌 Is a cotton thread a conductor or an insulator? (a) a conductor (b) an insulator
28. 28.🔁 What must there be for a current to flow? (a) a broken path (b) a plastic gap (c) one loose end (d) a complete loop
29. 29.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
30. 30.🔌 Is a glass marble a conductor or an insulator? (a) a conductor (b) an insulator
31. 31.True or false: a safety pin is a conductor. (a) True (b) False
32. 32.🔌 Which part of a screwdriver should an electrician hold? (a) the plastic handle (b) the steel shaft (c) the metal tip (d) the bare end
33. 33.🔍 Which is the odd one out? (a) fly kites in open fields (b) climb an electric pole (c) open a phone charger (d) throw cells in a fire
34. 34.💡 6 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
35. 35.🔦 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 paper strip. Does the bulb glow? (a) No (b) Yes
36. 36.💡 2 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
37. 37.🔍 Which is the odd one out? (a) a school bell (b) a doorbell (c) a loudspeaker (d) a mixer grinder
38. 38.⚡ A solar panel changes which kind of energy into electricity? (a) chemical energy (b) sound energy (c) light energy (d) wind energy
39. 39.True or false: a buzzer mainly gives out light. (a) True (b) False
40. 40.Which of these is not safe? (a) dry your hands first (b) touch a fallen wire (c) stay away from pylons (d) stop if a part gets hot

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