Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 423 · 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.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) diode (b) battery (c) wire (d) ammeter
2. 2.True or false: a tube light mainly gives out light. (a) False (b) True
3. 3.🔋 How many volts does one ordinary torch cell give? (a) 15 V (b) 1.5 V (c) 0.5 V (d) 230 V
4. 4.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 4 is taken out of its holder. How many bulbs glow?
5. 5.🔘 Which kind of switch closes near a magnet? (a) a reed switch (b) a toggle switch (c) a push button (d) a slide switch
6. 6.Which of these is true of a parallel circuit? (a) a single current path (b) a break stops every bulb (c) own switch for each bulb (d) one bulb out, all go out
7. 7.🔌 Most metals are good … (a) insulators (b) conductors (c) batteries (d) magnets only
8. 8.⚡ A cell changes stored chemical energy into which kind of energy? (a) wind energy (b) sound energy (c) nuclear energy (d) electrical energy
9. 9.🔗 Series or parallel circuit: “many paths for current”? (a) series (b) parallel
10. 10.🔁 What do we call a circuit with a break in it? (a) a closed circuit (b) a series circuit (c) an open circuit (d) a full circuit
11. 11.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) False (b) True
12. 12.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
13. 13.✏️ In a circuit diagram, wires are usually drawn as … (a) wavy lines (b) straight lines (c) little stars (d) dotted circles
14. 14.🔋 8 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)? =
15. 15.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
16. 16.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) open (b) closed
17. 17.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. Does the bulb glow? (a) No (b) Yes
18. 18.💡 Why is house wiring done in parallel? (a) so all go off together (b) to save copper only (c) each gets full voltage (d) to make bulbs dim
19. 19.🔋 How many 1.2 V cells must be joined in series to give 2.4 V?
20. 20.Which of these mainly gives out light? (a) a traffic signal (b) a ceiling fan (c) a water heater (d) an electric iron
21. 21.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a plastic straw across the gap. Does the bulb glow? (a) Yes (b) No
22. 22.🔍 Which is the odd one out? (a) a woollen thread (b) a rubber eraser (c) a steel coin (d) a rubber band
23. 23.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
24. 24.💡 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 1 is taken out of its holder. How many bulbs glow?
25. 25.💡 A battery lights 2 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
26. 26.Which of these is true of a series circuit? (a) used in house wiring (b) own switch for each bulb (c) one bulb out, all go out (d) each gets the full volts
27. 27.🔘 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 ON and C is OFF. Does the bulb glow? (a) No (b) Yes
28. 28.Which of these is safe? (a) use a cable with cuts (b) climb an electric pole (c) touch a switch when wet (d) keep drinks far away
29. 29.Which of these is a conductor? (a) a woollen thread (b) a rubber eraser (c) a dry cork (d) a safety pin
30. 30.🔋 4 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)? =
31. 31.Which of these uses electricity? (a) a bicycle dynamo (b) a television (c) a battery (d) a cell
32. 32.Which of these is safe? (a) touch a fallen wire (b) poke things in a socket (c) climb an electric pole (d) use small battery cells
33. 33.🔌 A gap of dry air between two wires acts as … (a) a cell (b) a conductor (c) a switch that is ON (d) an insulator
34. 34.🔁 Is the circuit closed or open if all wires are joined? (a) closed (b) open
35. 35.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
36. 36.🔘 Which kind of switch springs back when let go? (a) a toggle switch (b) a tilt switch (c) a push button (d) a slide switch
37. 37.🔋 A 3 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
38. 38.Which of these is true of a series circuit? (a) own switch for each bulb (b) a single current path (c) one out, the rest glow (d) each gets the full volts
39. 39.Which of these is a conductor? (a) a woollen thread (b) a metal paper clip (c) a plastic ruler (d) a glass marble
40. 40.True or false: if a cell is taken out, the circuit is closed and current flows. (a) False (b) True

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