Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 810 · 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.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) pour water on them (b) pull them by the hand (c) shout for an adult (d) wait and watch
2. 2.💡 2 identical bulbs are joined in series with a 3 V battery (ideal wires). How many volts does each bulb get? =
3. 3.Which of these is an insulator? (a) a steel coin (b) aluminium foil (c) a brass key (d) a plastic ruler
4. 4.True or false: to climb an electric pole is safe. (a) False (b) True
5. 5.🔍 Which is the odd one out? (a) dry your hands first (b) poke things in a socket (c) keep drinks far away (d) take cells out after use
6. 6.🔗 Series or parallel circuit: “each gets the full volts”? (a) parallel (b) series
7. 7.🔘 A bulb and a cell are joined through 5 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
8. 8.✏️ Why do engineers draw circuits with symbols? (a) symbols are heavier (b) to hide the circuit (c) to make it colourful (d) quick and clear for all
9. 9.Which of these is a conductor? (a) a ceramic cup (b) a dry cork (c) a rubber eraser (d) an iron nail
10. 10.True or false: a school bell mainly makes sound. (a) True (b) False
11. 11.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
12. 12.Which of these is an insulator? (a) a steel coin (b) a safety pin (c) a graphite rod (d) a rubber band
13. 13.True or false: a toggle switch stays where you flip it. (a) False (b) True
14. 14.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) when either is ON (b) only when both are ON (c) only when both are OFF (d) never
15. 15.⚠️ Is it safe to climb an electric pole? (a) safe (b) not safe
16. 16.True or false: if the switch is ON, the circuit is open and no current flows. (a) True (b) False
17. 17.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
18. 18.🔋 How many volts does one ordinary torch cell give? (a) 230 V (b) 0.5 V (c) 15 V (d) 1.5 V
19. 19.🔌 Is a steel coin a conductor or an insulator? (a) a conductor (b) an insulator
20. 20.💡 2 identical bulbs are joined in series with a 2 V battery (ideal wires). How many volts does each bulb get? =
21. 21.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
22. 22.🔘 When a switch is ON, the circuit is … (a) broken (b) open (c) cut (d) closed
23. 23.🔋 What is a battery? (a) a kind of bulb (b) two or more cells joined (c) a switch with a lid (d) one single wire
24. 24.What does a push button do? (a) slides side to side (b) closes when tipped over (c) flips up or down (d) springs back when let go
25. 25.Which of these is safe? (a) touch a switch when wet (b) use mains for a project (c) build with an adult near (d) poke things in a socket
26. 26.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
27. 27.True or false: one tall, one short bar is the symbol for a cell. (a) False (b) True
28. 28.True or false: a push button stays where you flip it. (a) True (b) False
29. 29.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) battery (b) motor (c) resistor (d) junction
30. 30.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
31. 31.💡 6 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 1 is taken out of its holder. How many bulbs glow?
32. 32.⚠️ Is it safe to use mains for a project? (a) safe (b) not safe
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) brighter (b) the same (c) dimmer
34. 34.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
35. 35.True or false: if a wire is cut, the circuit is open and no current flows. (a) False (b) True
36. 36.💡 2 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. Does bulb 2 glow? (a) Yes (b) No
37. 37.Which of these means the circuit is closed? (a) a cell is taken out (b) the bulb is unscrewed (c) the switch is OFF (d) all wires are joined
38. 38.Which of these means the circuit is closed? (a) a wire has come loose (b) the switch is OFF (c) the loop is complete (d) a wire is cut
39. 39.⚠️ Why must we never touch switches with wet hands? (a) it is just untidy (b) water makes it cold (c) it spoils the paint (d) water carries current
40. 40.Which drawing is the symbol for a bulb? (a) triangle, bar and arrows (b) a circle with a cross (c) a circle with M inside (d) a plain rectangle

Free electronics lessons, practice and worksheets at talentjr.in/electronics-for-kids