Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 873 · 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.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are ON (b) only when both are OFF (c) when either is ON (d) never
2. 2.🔘 When a switch is ON, the circuit is … (a) open (b) closed (c) cut (d) broken
3. 3.🔋 Does a battery give electricity or use electricity? (a) gives electricity (b) uses electricity
4. 4.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) False (b) True
5. 5.💡 5 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
6. 6.True or false: a circle with A inside is the symbol for an ammeter. (a) True (b) False
7. 7.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
8. 8.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
9. 9.🔘 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?
10. 10.Which of these is an insulator? (a) a steel coin (b) a graphite rod (c) a safety pin (d) a woollen thread
11. 11.🔌 Which metal is used for most electric wires at home? (a) plastic (b) glass (c) copper (d) rubber
12. 12.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) a single current path (c) one bulb out, all go out (d) each gets the full volts
13. 13.🔍 Which is the odd one out? (a) a metal paper clip (b) a plastic straw (c) a plastic ruler (d) a wooden stick
14. 14.True or false: a ceiling fan mainly gives out light. (a) True (b) False
15. 15.True or false: a plastic ruler is an insulator. (a) False (b) True
16. 16.🔘 Which kind of switch slides side to side? (a) a slide switch (b) a push button (c) a toggle switch (d) a tilt switch
17. 17.🔋 6 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)? =
18. 18.Which of these is a conductor? (a) a rubber band (b) a wooden stick (c) a rubber eraser (d) a brass key
19. 19.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
20. 20.💡 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
21. 21.Which of these uses electricity? (a) a power station (b) a solar panel (c) a mobile phone (d) a cell
22. 22.Which of these mainly gives out light? (a) an LED lamp (b) a ceiling fan (c) an electric drill (d) a loudspeaker
23. 23.True or false: if a wire has come loose, the circuit is open and no current flows. (a) True (b) False
24. 24.Which of these is an insulator? (a) an iron nail (b) a steel spoon (c) a copper wire (d) a glass marble
25. 25.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is OFF, B is ON and C is OFF. Does the bulb glow? (a) Yes (b) No
26. 26.🔘 Which kind of switch closes near a magnet? (a) a push button (b) a reed switch (c) a toggle switch (d) a slide switch
27. 27.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) the longer line (c) neither line (d) the shorter line
28. 28.⚠️ Is it safe to poke things in a socket? (a) not safe (b) safe
29. 29.⚠️ Which power source should children use for electronics projects? (a) a wall socket (b) an inverter socket (c) a mains extension board (d) a small battery pack
30. 30.True or false: to stop if a part gets hot is safe. (a) True (b) False
31. 31.True or false: to build with an adult near is safe. (a) False (b) True
32. 32.💡 4 identical bulbs are joined in series with a 12 V battery (ideal wires). How many volts does each bulb get? =
33. 33.✏️ In a circuit diagram, wires are usually drawn as … (a) dotted circles (b) little stars (c) wavy lines (d) straight lines
34. 34.Which of these means the circuit is closed? (a) all wires are joined (b) the bulb is unscrewed (c) a wire is cut (d) a cell is taken out
35. 35.What does a toggle switch do? (a) springs back when let go (b) closes when tipped over (c) stays where you flip it (d) works only while pressed
36. 36.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) motor (b) capacitor (c) bulb (d) LED
37. 37.💡 2 identical bulbs are joined in series with a 5 V battery (ideal wires). How many volts does each bulb get? =
38. 38.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) it does not matter (b) only one (c) both of them (d) none
39. 39.🔌 A gap of dry air between two wires acts as … (a) a conductor (b) a switch that is ON (c) an insulator (d) a cell
40. 40.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) resistor (b) bulb (c) motor (d) LED

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