Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 749 · 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.Which of these gives us electricity? (a) a water pump (b) a mobile phone (c) a washing machine (d) a wind turbine
2. 2.💡 4 identical bulbs are joined in series with a 4 V battery (ideal wires). How many volts does each bulb get? =
3. 3.True or false: aluminium foil is a conductor. (a) False (b) True
4. 4.🔍 Which is the odd one out? (a) keep drinks far away (b) use mains for a project (c) touch a switch when wet (d) touch a fallen wire
5. 5.💡 3 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 2 glow? (a) Yes (b) No
6. 6.💡 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
7. 7.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
8. 8.Which of these is safe? (a) open a phone charger (b) use a cable with cuts (c) poke things in a socket (d) build with an adult near
9. 9.💡 5 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
10. 10.🔍 Which is the odd one out? (a) dry your hands first (b) fly kites in open fields (c) use mains for a project (d) take cells out after use
11. 11.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) True (b) False
12. 12.🔋 Does a mobile phone give electricity or use electricity? (a) gives electricity (b) uses electricity
13. 13.🔗 Series or parallel circuit: “each gets the full volts”? (a) parallel (b) series
14. 14.🔘 A cell and a bulb are joined to 4 side-by-side paths with one switch on each path — A, B, C and D (parallel). A is OFF, B is ON, C is ON and D is ON. Does the bulb glow? (a) Yes (b) No
15. 15.True or false: if the loop is complete, the circuit is closed and current flows. (a) True (b) False
16. 16.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
17. 17.Which of these means the circuit is closed? (a) a cell is taken out (b) a wire has come loose (c) the bulb is unscrewed (d) the loop is complete
18. 18.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) dotted circles (c) wavy lines (d) straight lines
19. 19.🔌 Which metal is used for most electric wires at home? (a) rubber (b) glass (c) plastic (d) copper
20. 20.🔘 Which kind of switch springs back when let go? (a) a push button (b) a slide switch (c) a toggle switch (d) a tilt switch
21. 21.💡 A battery lights 4 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
22. 22.🔌 Is a rubber eraser a conductor or an insulator? (a) a conductor (b) an insulator
23. 23.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put an iron nail across the gap. Does the bulb glow? (a) No (b) Yes
24. 24.💡 2 identical bulbs are joined in series with a 3 V battery (ideal wires). How many volts does each bulb get? =
25. 25.🔋 How many 1.5 V cells must be joined in series to give 7.5 V?
26. 26.🔋 Does a washing machine give electricity or use electricity? (a) uses electricity (b) gives electricity
27. 27.🔋 A 9 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
28. 28.🔦 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
29. 29.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
30. 30.✏️ In a circuit diagram, which part is drawn as two equal parallel lines? (a) bulb (b) capacitor (c) voltmeter (d) diode
31. 31.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) True (b) False
32. 32.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) False (b) True
33. 33.True or false: to poke things in a socket is safe. (a) True (b) False
34. 34.🔍 Which is the odd one out? (a) climb an electric pole (b) dry your hands first (c) fly a kite near wires (d) touch a switch when wet
35. 35.🔋 How many 1.2 V cells must be joined in series to give 3.6 V?
36. 36.⚠️ Is it safe to use a cable with cuts? (a) safe (b) not safe
37. 37.True or false: “a single current path” is true of a series circuit. (a) True (b) False
38. 38.🔍 Which is the odd one out? (a) an iron nail (b) a woollen thread (c) a steel coin (d) a copper wire
39. 39.💡 4 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
40. 40.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False

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