Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 447 · 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 does a reed switch do? (a) closes near a magnet (b) flips up or down (c) slides side to side (d) stays where you flip it
2. 2.⚡ What does a traffic signal mainly change electricity into? (a) heat (b) movement (c) sound (d) light
3. 3.🔁 Is the circuit closed or open if a cell is taken out? (a) closed (b) open
4. 4.⚠️ Which power source should children use for electronics projects? (a) a mains extension board (b) a small battery pack (c) an inverter socket (d) a wall socket
5. 5.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) False (b) True
6. 6.Which of these means the circuit is open? (a) all wires are joined (b) the switch is ON (c) the bulb is unscrewed (d) the loop is complete
7. 7.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put aluminium foil across the gap. Does the bulb glow? (a) No (b) Yes
8. 8.✏️ In a cell symbol, which line is the + terminal? (a) the longer line (b) neither line (c) the shorter line (d) both lines
9. 9.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) True (b) False
10. 10.🔗 Series or parallel circuit: “a break stops every bulb”? (a) parallel (b) series
11. 11.What does a toggle switch do? (a) slides side to side (b) stays where you flip it (c) closes near a magnet (d) works only while pressed
12. 12.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
13. 13.⚡ Which tiny particles drift along a metal wire to carry the current? (a) water drops (b) dust particles (c) electrons (d) photons
14. 14.💡 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?
15. 15.True or false: if a wire has come loose, the circuit is open and no current flows. (a) True (b) False
16. 16.💡 Why is house wiring done in parallel? (a) to save copper only (b) to make bulbs dim (c) so all go off together (d) each gets full voltage
17. 17.🔌 Why are electric wires covered in plastic? (a) plastic is a conductor (b) plastic makes current (c) to make them heavy (d) plastic is an insulator
18. 18.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a dry cork across the gap. Does the bulb glow? (a) Yes (b) No
19. 19.⚠️ Is it safe to take cells out after use? (a) safe (b) not safe
20. 20.Which of these is not safe? (a) take cells out after use (b) stay away from pylons (c) use small battery cells (d) climb an electric pole
21. 21.True or false: a circle with M inside is the symbol for a motor. (a) False (b) True
22. 22.True or false: a buzzer mainly gives out heat. (a) False (b) True
23. 23.🔘 Which kind of switch flips up or down? (a) a slide switch (b) a reed switch (c) a push button (d) a toggle switch
24. 24.🔘 Two switches are in series. When does the bulb glow? (a) never (b) when both are ON (c) when either is ON (d) when both are OFF
25. 25.True or false: on a cell, “the flat end” means the − (negative) end. (a) False (b) True
26. 26.💡 6 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 5 is taken out of its holder. How many bulbs glow?
27. 27.🔘 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 ON, B is ON and C is ON. Does the bulb glow? (a) No (b) Yes
28. 28.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is OFF, B is OFF, C is ON and D is ON. Does the bulb glow? (a) No (b) Yes
29. 29.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
30. 30.True or false: “a single current path” is true of a series circuit. (a) True (b) False
31. 31.🔍 Which is the odd one out? (a) an iron nail (b) a brass key (c) a plastic ruler (d) a copper wire
32. 32.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) True (b) False
33. 33.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) a single current path (c) bulbs share the voltage (d) used in house wiring
34. 34.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) none (b) only one (c) both of them (d) it does not matter
35. 35.⚡ What does a night lamp mainly change electricity into? (a) sound (b) movement (c) heat (d) light
36. 36.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the switch (b) the base (c) the glass (d) the filament
37. 37.⚠️ Is it safe to throw cells in a fire? (a) not safe (b) safe
38. 38.Which of these means the circuit is open? (a) the loop is complete (b) all wires are joined (c) a cell is taken out (d) the switch is ON
39. 39.⚡ What do we call a flow of electric charge through a wire? (a) a magnet (b) sound (c) friction (d) electric current
40. 40.🔍 Which is the odd one out? (a) a night lamp (b) a ceiling fan (c) a tube light (d) a street light

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