Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 762 · 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 good bulb and a switch that is OFF. All the wires are firmly joined. A gap in one wire is bridged by a brass key. Does the bulb glow? (a) No (b) Yes
2. 2.Which of these is a conductor? (a) a glass marble (b) a ceramic cup (c) a safety pin (d) a rubber band
3. 3.True or false: to use small battery cells is safe. (a) False (b) True
4. 4.True or false: one tall, one short bar is the symbol for an LED. (a) True (b) False
5. 5.Which of these is true of a series circuit? (a) own switch for each bulb (b) a break stops every bulb (c) used in house wiring (d) many paths for current
6. 6.🔁 Is the circuit closed or open if all wires are joined? (a) open (b) closed
7. 7.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
8. 8.True or false: if the bulb is unscrewed, the circuit is closed and current flows. (a) False (b) True
9. 9.🔗 Series or parallel circuit: “own switch for each bulb”? (a) parallel (b) series
10. 10.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) motor (b) wire (c) cell (d) resistor
11. 11.True or false: a toggle switch flips up or down. (a) False (b) True
12. 12.⚠️ Who should be with you when you build a circuit? (a) nobody (b) a stranger online (c) a younger child (d) a trusted adult
13. 13.🔋 Does a solar panel give electricity or use electricity? (a) uses electricity (b) gives electricity
14. 14.True or false: to take cells out after use is safe. (a) False (b) True
15. 15.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
16. 16.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by aluminium foil. Does the bulb glow? (a) No (b) Yes
17. 17.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
18. 18.💡 A battery lights 4 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
19. 19.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
20. 20.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they explode (c) they keep glowing (d) they get dimmer
21. 21.✏️ In a circuit diagram, which part is drawn as a straight line? (a) wire (b) capacitor (c) voltmeter (d) cell
22. 22.🔌 Is a woollen thread a conductor or an insulator? (a) an insulator (b) a conductor
23. 23.🔋 Identical cells side by side (in parallel) give … (a) double the voltage (b) half the voltage (c) no voltage (d) the same voltage
24. 24.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a plastic ruler. Does the bulb glow? (a) Yes (b) No
25. 25.🔌 Most metals are good … (a) conductors (b) insulators (c) magnets only (d) batteries
26. 26.💡 3 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
27. 27.🔁 Is the circuit closed or open if the switch is OFF? (a) closed (b) open
28. 28.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) in parallel (c) in series (d) not joined
29. 29.✏️ In a circuit diagram, which part is drawn as a dot where wires meet? (a) wire (b) ammeter (c) capacitor (d) junction
30. 30.True or false: a torch mainly makes sound. (a) True (b) False
31. 31.True or false: a reed switch closes when tipped over. (a) False (b) True
32. 32.🔘 Which kind of switch flips up or down? (a) a tilt switch (b) a slide switch (c) a reed switch (d) a toggle switch
33. 33.🔦 A circuit has a used-up (dead) cell, a good bulb and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a copper wire. Does the bulb glow? (a) No (b) Yes
34. 34.Which of these is true of a series circuit? (a) each gets the full volts (b) one out, the rest glow (c) bulbs share the voltage (d) used in house wiring
35. 35.✏️ In a circuit diagram, wires are usually drawn as … (a) straight lines (b) little stars (c) wavy lines (d) dotted circles
36. 36.🔁 What must there be for a current to flow? (a) a broken path (b) one loose end (c) a plastic gap (d) a complete loop
37. 37.🔋 A 12 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
38. 38.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
39. 39.⚠️ Is it safe to fly kites in open fields? (a) not safe (b) safe
40. 40.🔍 Which is the odd one out? (a) dry your hands first (b) build with an adult near (c) keep drinks far away (d) open a phone charger

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