Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 884 · 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 one tall, one short bar? (a) junction (b) cell (c) bulb (d) switch
2. 2.Which of these gives us electricity? (a) a refrigerator (b) a bicycle dynamo (c) a mobile phone (d) a television
3. 3.Which of these mainly gives out heat? (a) an electric toy car (b) a buzzer (c) a rice cooker (d) a siren
4. 4.🔌 Which metal is used for most electric wires at home? (a) copper (b) plastic (c) rubber (d) glass
5. 5.True or false: an iron nail is an insulator. (a) False (b) True
6. 6.🔋 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)? =
7. 7.🔋 Does a battery give electricity or use electricity? (a) gives electricity (b) uses electricity
8. 8.⚠️ Is it safe to stay away from pylons? (a) safe (b) not safe
9. 9.True or false: a ceiling fan mainly makes sound. (a) True (b) False
10. 10.⚡ A fan changes electrical energy mainly into which kind of energy? (a) sound energy (b) chemical energy (c) movement energy (d) light energy
11. 11.🔘 Which kind of switch works only while pressed? (a) a toggle switch (b) a push button (c) a reed switch (d) a slide switch
12. 12.🔍 Which is the odd one out? (a) use mains for a project (b) build with an adult near (c) touch a fallen wire (d) touch a switch when wet
13. 13.Which of these is a conductor? (a) a glass marble (b) a steel spoon (c) a plastic ruler (d) a plastic straw
14. 14.🔌 Why are electric wires covered in plastic? (a) plastic is a conductor (b) to make them heavy (c) plastic is an insulator (d) plastic makes current
15. 15.🔘 Two switches are in series. When does the bulb glow? (a) when both are ON (b) never (c) when both are OFF (d) when either is ON
16. 16.True or false: an LED lamp mainly makes movement. (a) True (b) False
17. 17.🔋 What is a battery? (a) one single wire (b) a kind of bulb (c) two or more cells joined (d) a switch with a lid
18. 18.True or false: a small empty box is the symbol for a resistor. (a) False (b) True
19. 19.🔋 Does a television give electricity or use electricity? (a) gives electricity (b) uses electricity
20. 20.True or false: a loudspeaker mainly makes sound. (a) False (b) True
21. 21.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is ON and B is ON. Does the bulb glow? (a) Yes (b) No
22. 22.Which of these means the circuit is open? (a) all wires are joined (b) a wire has come loose (c) the loop is complete (d) the switch is ON
23. 23.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
24. 24.⚡ What do we call a flow of electric charge through a wire? (a) a magnet (b) friction (c) electric current (d) sound
25. 25.🔘 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 OFF and C is OFF. Does the bulb glow? (a) No (b) Yes
26. 26.Which of these is safe? (a) throw cells in a fire (b) use small battery cells (c) climb an electric pole (d) use a cable with cuts
27. 27.True or false: a copper wire is an insulator. (a) False (b) True
28. 28.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) False (b) True
29. 29.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) cell (b) diode (c) ammeter (d) resistor
30. 30.💡 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?
31. 31.True or false: a toggle switch works only while pressed. (a) True (b) False
32. 32.💡 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 2 and 3 are taken out of their holders. How many bulbs glow?
33. 33.What does a toggle switch do? (a) closes near a magnet (b) stays where you flip it (c) works only while pressed (d) closes when tipped over
34. 34.💡 In a series circuit, how many paths does the current have? (a) two (b) one for each bulb (c) none (d) one
35. 35.Which of these is true of a series circuit? (a) own switch for each bulb (b) bulbs share the voltage (c) one out, the rest glow (d) many paths for current
36. 36.True or false: aluminium foil is an insulator. (a) True (b) False
37. 37.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) motor (b) bulb (c) diode (d) voltmeter
38. 38.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a safety pin across the gap. Does the bulb glow? (a) No (b) Yes
39. 39.True or false: a reed switch works only while pressed. (a) True (b) False
40. 40.⚠️ Which power source should children use for electronics projects? (a) a mains extension board (b) a wall socket (c) an inverter socket (d) a small battery pack

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