Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 701 · 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 in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
2. 2.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is ON, B is ON, C is ON and D is ON. Does the bulb glow? (a) Yes (b) No
3. 3.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they keep glowing (c) they all go out (d) they get dimmer
4. 4.True or false: a circle with M inside is the symbol for a wire. (a) True (b) False
5. 5.Which of these is a conductor? (a) a rubber band (b) a safety pin (c) a glass marble (d) a plastic ruler
6. 6.True or false: a slide switch flips up or down. (a) True (b) False
7. 7.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
8. 8.True or false: aluminium foil is an insulator. (a) False (b) True
9. 9.🔋 How many 3 V cells must be joined in series to give 21 V?
10. 10.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) False (b) True
11. 11.Which of these mainly gives out light? (a) a buzzer (b) a night lamp (c) a table fan (d) a school bell
12. 12.⚡ What does a ceiling fan mainly change electricity into? (a) heat (b) sound (c) light (d) movement
13. 13.✏️ In a circuit diagram, which part is drawn as a circle with A inside? (a) junction (b) capacitor (c) ammeter (d) bulb
14. 14.🔋 2 identical 1.2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
15. 15.💡 4 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
16. 16.🔋 A 9 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
17. 17.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the glass (b) the switch (c) the filament (d) the base
18. 18.⚡ What does a tube light mainly change electricity into? (a) heat (b) movement (c) light (d) sound
19. 19.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a copper wire across the gap. Does the bulb glow? (a) No (b) Yes
20. 20.Which of these is not safe? (a) climb an electric pole (b) use small battery cells (c) stay away from pylons (d) build with an adult near
21. 21.💡 6 identical bulbs are in parallel and each bulb has its own switch on its path. 3 of the switches are OFF and the rest are ON. How many bulbs glow?
22. 22.🔍 Which is the odd one out? (a) aluminium foil (b) a safety pin (c) a steel coin (d) a cotton thread
23. 23.True or false: a push button flips up or down. (a) False (b) True
24. 24.🔘 Which kind of switch works only while pressed? (a) a toggle switch (b) a tilt switch (c) a push button (d) a slide switch
25. 25.Which of these is safe? (a) use a cable with cuts (b) use mains for a project (c) fly kites in open fields (d) throw cells in a fire
26. 26.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
27. 27.🔘 Which kind of switch stays where you flip it? (a) a reed switch (b) a toggle switch (c) a push button (d) a tilt switch
28. 28.True or false: “used in house wiring” is true of a series circuit. (a) False (b) True
29. 29.Which of these mainly makes sound? (a) a room heater (b) a school bell (c) a traffic signal (d) a street light
30. 30.💡 3 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 3 is taken out of its holder. Does bulb 1 glow? (a) No (b) Yes
31. 31.✏️ In a circuit diagram, which part is drawn as a line lifted at a gap? (a) resistor (b) battery (c) junction (d) switch
32. 32.Which of these mainly makes movement? (a) an electric iron (b) a loudspeaker (c) a buzzer (d) a mixer grinder
33. 33.True or false: if a wire is cut, the circuit is open and no current flows. (a) False (b) True
34. 34.🔋 Does a bicycle dynamo give electricity or use electricity? (a) gives electricity (b) uses electricity
35. 35.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
36. 36.🔋 3 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
37. 37.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
38. 38.Which of these means the circuit is closed? (a) the switch is OFF (b) all wires are joined (c) a wire has come loose (d) the bulb is unscrewed
39. 39.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
40. 40.What does a push button do? (a) springs back when let go (b) flips up or down (c) slides side to side (d) stays where you flip it

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