Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 75 · 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.🔁 Is the circuit closed or open if the loop is complete? (a) closed (b) open
2. 2.🔌 Is a copper wire a conductor or an insulator? (a) a conductor (b) an insulator
3. 3.🔘 What does a switch do in a circuit? (a) changes the voltage (b) opens or closes the loop (c) stores current (d) makes electricity
4. 4.💡 6 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
5. 5.Which of these is an insulator? (a) a safety pin (b) a metal paper clip (c) a brass key (d) a woollen thread
6. 6.🔦 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 paper strip. Does the bulb glow? (a) Yes (b) No
7. 7.🔁 Is the circuit closed or open if a cell is taken out? (a) open (b) closed
8. 8.True or false: a mixer grinder mainly makes movement. (a) True (b) False
9. 9.💡 A battery lights 5 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
10. 10.✏️ Why do engineers draw circuits with symbols? (a) to hide the circuit (b) quick and clear for all (c) to make it colourful (d) symbols are heavier
11. 11.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) shout for an adult (b) pour water on them (c) wait and watch (d) pull them by the hand
12. 12.✏️ In a circuit diagram, which part is drawn as a circle with A inside? (a) motor (b) cell (c) resistor (d) ammeter
13. 13.🔋 3 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
14. 14.🔁 Is the circuit closed or open if the switch is OFF? (a) closed (b) open
15. 15.🔗 Series or parallel circuit: “one out, the rest glow”? (a) series (b) parallel
16. 16.💡 In a series circuit, how many paths does the current have? (a) two (b) none (c) one for each bulb (d) one
17. 17.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) False (b) True
18. 18.✏️ In a circuit diagram, which part is drawn as a circle with V inside? (a) battery (b) switch (c) voltmeter (d) bulb
19. 19.True or false: to build with an adult near is not safe. (a) True (b) False
20. 20.🔌 A gap of dry air between two wires acts as … (a) a switch that is ON (b) a cell (c) an insulator (d) a conductor
21. 21.🔘 Which kind of switch springs back when let go? (a) a tilt switch (b) a slide switch (c) a reed switch (d) a push button
22. 22.🔍 Which is the odd one out? (a) an electric kettle (b) a water heater (c) a table fan (d) an electric iron
23. 23.Which of these is an insulator? (a) a graphite rod (b) an iron nail (c) a wooden stick (d) a brass key
24. 24.⚠️ Is it safe to use mains for a project? (a) not safe (b) safe
25. 25.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
26. 26.Which of these means the circuit is closed? (a) a wire has come loose (b) the loop is complete (c) a wire is cut (d) the switch is OFF
27. 27.🔘 Which kind of switch works only while pressed? (a) a toggle switch (b) a tilt switch (c) a push button (d) a reed switch
28. 28.True or false: a dry cork is a conductor. (a) False (b) True
29. 29.⚡ Which tiny particles drift along a metal wire to carry the current? (a) photons (b) water drops (c) electrons (d) dust particles
30. 30.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
31. 31.Which of these uses electricity? (a) a solar panel (b) a cell (c) a wind turbine (d) a water pump
32. 32.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
33. 33.💡 A battery lights 4 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
34. 34.True or false: a circle with an X in it is the symbol for a voltmeter. (a) True (b) False
35. 35.🔦 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 a cotton thread. Does the bulb glow? (a) No (b) Yes
36. 36.True or false: a toaster mainly gives out heat. (a) True (b) False
37. 37.🔌 Is a rubber eraser a conductor or an insulator? (a) an insulator (b) a conductor
38. 38.True or false: two equal parallel lines is the symbol for a capacitor. (a) False (b) True
39. 39.💡 5 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
40. 40.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)

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