Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 841 · 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 mainly makes sound? (a) a loudspeaker (b) a ceiling fan (c) an electric drill (d) a toaster
2. 2.Which drawing is the symbol for an ammeter? (a) a circle with an X in it (b) a circle with A inside (c) many long-short pairs (d) a long and a short line
3. 3.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
4. 4.⚡ What does a buzzer mainly change electricity into? (a) sound (b) heat (c) movement (d) light
5. 5.💡 5 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?
6. 6.💡 2 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. Does bulb 1 glow? (a) No (b) Yes
7. 7.Which of these is not safe? (a) build with an adult near (b) stop if a part gets hot (c) poke things in a socket (d) use small battery cells
8. 8.Which of these mainly makes sound? (a) a room heater (b) a toaster (c) a school bell (d) a rice cooker
9. 9.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
10. 10.✏️ Why do engineers draw circuits with symbols? (a) symbols are heavier (b) to make it colourful (c) to hide the circuit (d) quick and clear for all
11. 11.Which of these is true of a series circuit? (a) used in house wiring (b) one out, the rest glow (c) a break stops every bulb (d) each gets the full volts
12. 12.⚡ What does a siren mainly change electricity into? (a) heat (b) movement (c) light (d) sound
13. 13.🔋 How many 3 V cells must be joined in series to give 21 V?
14. 14.🔦 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) No (b) Yes
15. 15.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
16. 16.🔘 A bulb and a cell are joined through 2 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
17. 17.⚡ What does a street light mainly change electricity into? (a) sound (b) movement (c) heat (d) light
18. 18.True or false: a push button works only while pressed. (a) False (b) True
19. 19.Which of these means the circuit is closed? (a) the switch is OFF (b) all wires are joined (c) a cell is taken out (d) a wire is cut
20. 20.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) series (b) parallel
21. 21.🔘 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?
22. 22.💡 2 identical bulbs are joined in series with a 2 V battery (ideal wires). How many volts does each bulb get? =
23. 23.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. A gap in one wire is bridged by a paper strip. Does the bulb glow? (a) No (b) Yes
24. 24.💡 In a series circuit, how many paths does the current have? (a) two (b) one (c) one for each bulb (d) none
25. 25.⚡ A fan changes electrical energy mainly into which kind of energy? (a) light energy (b) movement energy (c) chemical energy (d) sound energy
26. 26.💡 A battery lights 3 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
27. 27.⚠️ Is it safe to use a cable with cuts? (a) safe (b) not safe
28. 28.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) by Wi-Fi (c) in series (d) in parallel
29. 29.🔋 Does a television give electricity or use electricity? (a) uses electricity (b) gives electricity
30. 30.What does a push button do? (a) works only while pressed (b) flips up or down (c) closes when tipped over (d) slides side to side
31. 31.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
32. 32.True or false: a woollen thread is an insulator. (a) True (b) False
33. 33.💡 A battery lights 2 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
34. 34.True or false: a paper strip is an insulator. (a) False (b) True
35. 35.🔘 A cell and a bulb are joined to 2 side-by-side paths with one switch on each path — A and B (parallel). A is OFF and B is OFF. Does the bulb glow? (a) Yes (b) No
36. 36.🔁 What do we call a circuit with a break in it? (a) a series circuit (b) an open circuit (c) a closed circuit (d) a full circuit
37. 37.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a dry cork across the gap. Does the bulb glow? (a) Yes (b) No
38. 38.True or false: a cotton thread is an insulator. (a) True (b) False
39. 39.🔋 What should you do with used-up cells? (a) bury them in soil (b) give them for recycling (c) throw them in a fire (d) cut them open
40. 40.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) open (b) closed

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