Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 368 · 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 is a conductor? (a) a woollen thread (b) a wooden stick (c) a graphite rod (d) a plastic ruler
2. 2.🔘 Which kind of switch works only while pressed? (a) a tilt switch (b) a toggle switch (c) a push button (d) a slide switch
3. 3.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
4. 4.🔁 What must there be for a current to flow? (a) a complete loop (b) one loose end (c) a broken path (d) a plastic gap
5. 5.Which of these is true of a series circuit? (a) one bulb out, all go out (b) each gets the full volts (c) one out, the rest glow (d) own switch for each bulb
6. 6.🔦 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 an iron nail. Does the bulb glow? (a) No (b) Yes
7. 7.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
8. 8.True or false: on a cell, “the flat end” means the + (positive) end. (a) False (b) True
9. 9.🔍 Which is the odd one out? (a) a traffic signal (b) a torch (c) a tube light (d) a buzzer
10. 10.🔁 Is the circuit closed or open if the loop is complete? (a) closed (b) open
11. 11.Which drawing is the symbol for a cell? (a) a dot where wires meet (b) a circle with M inside (c) a circle with an X in it (d) one tall, one short bar
12. 12.💡 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 2 is taken out of its holder. How many bulbs glow?
13. 13.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
14. 14.🔌 Is a plastic straw a conductor or an insulator? (a) an insulator (b) a conductor
15. 15.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) True (b) False
16. 16.🔍 Which is the odd one out? (a) fly kites in open fields (b) stay away from pylons (c) open a phone charger (d) dry your hands first
17. 17.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a glass marble across the gap. Does the bulb glow? (a) No (b) Yes
18. 18.🔘 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) Yes (b) No
19. 19.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) False (b) True
20. 20.🔋 Does a television give electricity or use electricity? (a) gives electricity (b) uses electricity
21. 21.True or false: triangle against a bar is the symbol for an LED. (a) True (b) False
22. 22.✏️ In a circuit diagram, which part is drawn as a line lifted at a gap? (a) battery (b) capacitor (c) junction (d) switch
23. 23.💡 In a series circuit, how many paths does the current have? (a) none (b) two (c) one (d) one for each bulb
24. 24.Which of these mainly makes sound? (a) a table fan (b) an electric toy car (c) a rice cooker (d) a buzzer
25. 25.💡 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
26. 26.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) capacitor (b) LED (c) cell (d) bulb
27. 27.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
28. 28.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) by Wi-Fi (c) not joined (d) in series
29. 29.True or false: to build with an adult near is not safe. (a) True (b) False
30. 30.🔗 Series or parallel circuit: “each gets the full volts”? (a) parallel (b) series
31. 31.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) wire (b) diode (c) junction (d) resistor
32. 32.True or false: a glass marble is a conductor. (a) False (b) True
33. 33.Which of these is a conductor? (a) an iron nail (b) a dry cork (c) a ceramic cup (d) a paper strip
34. 34.🔋 6 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)? =
35. 35.Which of these is safe? (a) use mains for a project (b) fly a kite near wires (c) dry your hands first (d) open a phone charger
36. 36.🔘 Which kind of switch closes near a magnet? (a) a push button (b) a reed switch (c) a tilt switch (d) a toggle switch
37. 37.🔗 Series or parallel circuit: “own switch for each bulb”? (a) parallel (b) series
38. 38.True or false: two equal parallel lines is the symbol for a capacitor. (a) False (b) True
39. 39.Which of these is safe? (a) touch a switch when wet (b) touch a fallen wire (c) use a cable with cuts (d) use small battery cells
40. 40.💡 2 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =

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