Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 554 · 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 of these is true of a parallel circuit? (a) one bulb out, all go out (b) bulbs share the voltage (c) a break stops every bulb (d) many paths for current
2. 2.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
3. 3.Which of these is safe? (a) touch a fallen wire (b) use a cable with cuts (c) fly a kite near wires (d) use small battery cells
4. 4.🔘 Which kind of switch works only while pressed? (a) a toggle switch (b) a reed switch (c) a push button (d) a tilt switch
5. 5.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) to save copper only (c) each gets full voltage (d) so all go off together
6. 6.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
7. 7.🔋 How many volts does one ordinary torch cell give? (a) 1.5 V (b) 0.5 V (c) 15 V (d) 230 V
8. 8.Which of these is not safe? (a) stay away from pylons (b) keep drinks far away (c) dry your hands first (d) fly a kite near wires
9. 9.💡 4 identical bulbs are joined in series with a 10 V battery (ideal wires). How many volts does each bulb get? =
10. 10.🔘 Which kind of switch flips up or down? (a) a slide switch (b) a toggle switch (c) a tilt switch (d) a push button
11. 11.Which of these is a conductor? (a) a woollen thread (b) an iron nail (c) a rubber eraser (d) a paper strip
12. 12.🔗 Series or parallel circuit: “each gets the full volts”? (a) series (b) parallel
13. 13.🔘 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 ON, B is OFF and C is ON. Does the bulb glow? (a) No (b) Yes
14. 14.✏️ In a circuit diagram, wires are usually drawn as … (a) wavy lines (b) straight lines (c) little stars (d) dotted circles
15. 15.⚠️ Is it safe to build with an adult near? (a) safe (b) not safe
16. 16.True or false: to build with an adult near is not safe. (a) True (b) False
17. 17.✏️ In a cell symbol, which line is the + terminal? (a) the longer line (b) the shorter line (c) both lines (d) neither line
18. 18.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. How many bulbs glow?
19. 19.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a wooden stick across the gap. Does the bulb glow? (a) No (b) Yes
20. 20.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
21. 21.⚡ What does a room heater mainly change electricity into? (a) light (b) heat (c) movement (d) sound
22. 22.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
23. 23.🔋 A 6 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
24. 24.⚡ What does a toaster mainly change electricity into? (a) sound (b) light (c) heat (d) movement
25. 25.💡 3 identical bulbs are in parallel and each bulb has its own switch on its path. 1 of the switches is OFF and the rest are ON. How many bulbs glow?
26. 26.⚡ What does an electric toy car mainly change electricity into? (a) light (b) movement (c) heat (d) sound
27. 27.🔋 What is a battery? (a) a switch with a lid (b) two or more cells joined (c) a kind of bulb (d) one single wire
28. 28.🔌 Which metal is used for most electric wires at home? (a) rubber (b) plastic (c) glass (d) copper
29. 29.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) False (b) True
30. 30.⚠️ Is it safe to use small battery cells? (a) not safe (b) safe
31. 31.🔍 Which is the odd one out? (a) a wooden stick (b) a plastic ruler (c) a brass key (d) a dry cork
32. 32.True or false: to keep drinks far away is safe. (a) False (b) True
33. 33.True or false: a ceramic cup is a conductor. (a) False (b) True
34. 34.⚠️ Why must we never touch switches with wet hands? (a) it is just untidy (b) water carries current (c) it spoils the paint (d) water makes it cold
35. 35.True or false: a long and a short line is the symbol for a bulb. (a) True (b) False
36. 36.🔋 How many 1.2 V cells must be joined in series to give 8.4 V?
37. 37.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
38. 38.✏️ In a circuit diagram, which part is drawn as a straight line? (a) diode (b) motor (c) wire (d) capacitor
39. 39.🔌 Is a dry cork a conductor or an insulator? (a) an insulator (b) a conductor
40. 40.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True

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