Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 246 · 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.💡 2 identical bulbs are joined in series with an 8 V battery (ideal wires). How many volts does each bulb get? =
2. 2.🔌 Is a metal paper clip a conductor or an insulator? (a) an insulator (b) a conductor
3. 3.🔘 Which kind of switch closes when tipped over? (a) a push button (b) a slide switch (c) a tilt switch (d) a reed switch
4. 4.Which of these is a conductor? (a) a plastic straw (b) a paper strip (c) a ceramic cup (d) a brass key
5. 5.🔋 4 identical 2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
6. 6.🔍 Which is the odd one out? (a) a steel coin (b) a paper strip (c) a wooden stick (d) a cotton thread
7. 7.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) wait and watch (b) pull them by the hand (c) shout for an adult (d) pour water on them
8. 8.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) none (b) both of them (c) it does not matter (d) only one
9. 9.🔌 Is a brass key a conductor or an insulator? (a) an insulator (b) a conductor
10. 10.🔌 Which part of a screwdriver should an electrician hold? (a) the metal tip (b) the plastic handle (c) the steel shaft (d) the bare end
11. 11.True or false: “many paths for current” is true of a series circuit. (a) True (b) False
12. 12.⚡ What does an electric kettle mainly change electricity into? (a) movement (b) sound (c) heat (d) light
13. 13.True or false: to keep drinks far away is safe. (a) True (b) False
14. 14.💡 2 identical bulbs are joined in parallel (each on its own side-by-side path) with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. How many bulbs glow?
15. 15.⚡ A fan changes electrical energy mainly into which kind of energy? (a) movement energy (b) sound energy (c) chemical energy (d) light energy
16. 16.True or false: a night lamp mainly gives out light. (a) False (b) True
17. 17.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) the longer line (c) neither line (d) the shorter line
18. 18.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) each gets full voltage (c) so all go off together (d) to save copper only
19. 19.⚡ Which tiny particles drift along a metal wire to carry the current? (a) dust particles (b) photons (c) water drops (d) electrons
20. 20.Which of these is true of a series circuit? (a) a break stops every bulb (b) each gets the full volts (c) one out, the rest glow (d) used in house wiring
21. 21.🔌 Which metal is used for most electric wires at home? (a) glass (b) rubber (c) copper (d) plastic
22. 22.💡 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
23. 23.✏️ Why do engineers draw circuits with symbols? (a) quick and clear for all (b) to hide the circuit (c) to make it colourful (d) symbols are heavier
24. 24.True or false: a circle with M inside is the symbol for a motor. (a) False (b) True
25. 25.🔍 Which is the odd one out? (a) use mains for a project (b) use a cable with cuts (c) build with an adult near (d) climb an electric pole
26. 26.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) one bulb out, all go out (c) used in house wiring (d) a single current path
27. 27.True or false: triangle against a bar is the symbol for a diode. (a) True (b) False
28. 28.Which of these mainly makes sound? (a) a rice cooker (b) an electric drill (c) a doorbell (d) a torch
29. 29.🔘 When a switch is ON, the circuit is … (a) cut (b) closed (c) broken (d) open
30. 30.🔘 Which kind of switch flips up or down? (a) a slide switch (b) a reed switch (c) a toggle switch (d) a push button
31. 31.True or false: a plain rectangle is the symbol for a resistor. (a) False (b) True
32. 32.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
33. 33.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
34. 34.🔋 Identical cells side by side (in parallel) give … (a) double the voltage (b) half the voltage (c) the same voltage (d) no voltage
35. 35.⚠️ Is it safe to stop if a part gets hot? (a) safe (b) not safe
36. 36.🔋 3 identical 1.5 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
37. 37.🔍 Which is the odd one out? (a) keep drinks far away (b) stop if a part gets hot (c) stay away from pylons (d) touch a switch when wet
38. 38.⚠️ Which power source should children use for electronics projects? (a) an inverter socket (b) a wall socket (c) a small battery pack (d) a mains extension board
39. 39.🔁 Is the circuit closed or open if a cell is taken out? (a) open (b) closed
40. 40.True or false: to throw cells in a fire is not safe. (a) False (b) True

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