Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 242 · 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.🔦 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
2. 2.🔘 A bulb and a cell are joined through 6 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
3. 3.True or false: on a cell, “the flat end” means the − (negative) end. (a) True (b) False
4. 4.🔘 A bulb and a cell are joined through 3 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
5. 5.⚡ Which tiny particles drift along a metal wire to carry the current? (a) dust particles (b) photons (c) water drops (d) electrons
6. 6.🔍 Which is the odd one out? (a) aluminium foil (b) a plastic straw (c) a cotton thread (d) a dry cork
7. 7.True or false: many long-short pairs is the symbol for a battery. (a) False (b) True
8. 8.Which of these is an insulator? (a) aluminium foil (b) a safety pin (c) an iron nail (d) a wooden stick
9. 9.💡 4 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. Bulbs 1 and 2 are taken out of their holders. How many bulbs glow?
10. 10.Which of these gives us electricity? (a) a mobile phone (b) a wind turbine (c) a computer (d) a water pump
11. 11.🔌 Is a graphite rod a conductor or an insulator? (a) an insulator (b) a conductor
12. 12.🔍 Which is the odd one out? (a) use small battery cells (b) dry your hands first (c) stay away from pylons (d) touch a switch when wet
13. 13.⚠️ Is it safe to throw cells in a fire? (a) not safe (b) safe
14. 14.Which of these is safe? (a) touch a fallen wire (b) poke things in a socket (c) build with an adult near (d) use a cable with cuts
15. 15.⚠️ Is it safe to stay away from pylons? (a) safe (b) not safe
16. 16.⚠️ Is it safe to stop if a part gets hot? (a) safe (b) not safe
17. 17.True or false: to dry your hands first is not safe. (a) True (b) False
18. 18.💡 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 6 is taken out of its holder. How many bulbs glow?
19. 19.True or false: two or more cell symbols is the symbol for a motor. (a) False (b) True
20. 20.💡 A battery lights 3 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
21. 21.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. Does bulb 4 glow? (a) No (b) Yes
22. 22.🔦 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) Yes (b) No
23. 23.✏️ In a circuit diagram, which part is drawn as two equal parallel lines? (a) bulb (b) capacitor (c) diode (d) resistor
24. 24.⚡ What does an electric kettle mainly change electricity into? (a) light (b) heat (c) movement (d) sound
25. 25.⚡ What does a street light mainly change electricity into? (a) heat (b) movement (c) sound (d) light
26. 26.💡 A battery lights 5 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
27. 27.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) two (c) none (d) one
28. 28.True or false: “one out, the rest glow” is true of a series circuit. (a) False (b) True
29. 29.🔘 When a switch is ON, the circuit is … (a) cut (b) closed (c) broken (d) open
30. 30.True or false: to poke things in a socket is safe. (a) True (b) False
31. 31.🔦 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) Yes (b) No
32. 32.💡 4 identical bulbs are joined in series with a 4 V battery (ideal wires). How many volts does each bulb get? =
33. 33.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are OFF (b) when either is ON (c) only when both are ON (d) never
34. 34.🔗 Series or parallel circuit: “one out, the rest glow”? (a) series (b) parallel
35. 35.⚠️ Is it safe to use a cable with cuts? (a) not safe (b) safe
36. 36.True or false: a straight line is the symbol for a junction. (a) False (b) True
37. 37.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
38. 38.True or false: a woollen thread is a conductor. (a) True (b) False
39. 39.⚡ What does a room heater mainly change electricity into? (a) sound (b) heat (c) movement (d) light
40. 40.🔁 Is the circuit closed or open if the loop is complete? (a) closed (b) open

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