Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 694 · 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.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) in series (c) by Wi-Fi (d) not joined
2. 2.True or false: “each gets the full volts” is true of a parallel circuit. (a) True (b) False
3. 3.🔍 Which is the odd one out? (a) throw cells in a fire (b) climb an electric pole (c) use small battery cells (d) use mains for a project
4. 4.💡 Why is house wiring done in parallel? (a) so all go off together (b) to save copper only (c) to make bulbs dim (d) each gets full voltage
5. 5.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 3 is taken out of its holder. How many bulbs glow?
6. 6.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a bulb (b) a plug top (c) a fuse or MCB (d) a long wire
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.Which of these is true of a parallel circuit? (a) a single current path (b) one bulb out, all go out (c) each gets the full volts (d) bulbs share the voltage
9. 9.⚠️ Is it safe to open a phone charger? (a) safe (b) not safe
10. 10.🔘 What does a switch do in a circuit? (a) changes the voltage (b) stores current (c) makes electricity (d) opens or closes the loop
11. 11.🔍 Which is the odd one out? (a) dry your hands first (b) fly a kite near wires (c) stop if a part gets hot (d) keep drinks far away
12. 12.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) True (b) False
13. 13.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the glass (b) the base (c) the filament (d) the switch
14. 14.🔌 Is a woollen thread a conductor or an insulator? (a) a conductor (b) an insulator
15. 15.True or false: a wooden stick is an insulator. (a) False (b) True
16. 16.Which drawing is the symbol for a cell? (a) a straight line (b) triangle against a bar (c) one tall, one short bar (d) a circle with V inside
17. 17.Which of these is true of a series circuit? (a) many paths for current (b) own switch for each bulb (c) one out, the rest glow (d) a single current path
18. 18.🔋 What should you do with used-up cells? (a) give them for recycling (b) bury them in soil (c) cut them open (d) throw them in a fire
19. 19.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 3 is taken out of its holder. How many bulbs glow?
20. 20.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
21. 21.What does a tilt switch do? (a) closes when tipped over (b) flips up or down (c) springs back when let go (d) closes near a magnet
22. 22.🔍 Which is the odd one out? (a) an iron nail (b) a rubber eraser (c) a rubber band (d) a woollen thread
23. 23.💡 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
24. 24.True or false: to climb an electric pole is not safe. (a) True (b) False
25. 25.⚠️ Is it safe to touch a fallen wire? (a) safe (b) not safe
26. 26.🔗 Series or parallel circuit: “own switch for each bulb”? (a) parallel (b) series
27. 27.⚡ What does a room heater mainly change electricity into? (a) heat (b) light (c) sound (d) movement
28. 28.True or false: a small empty box is the symbol for a diode. (a) False (b) True
29. 29.✏️ In a circuit diagram, which part is drawn as a circle with A inside? (a) ammeter (b) diode (c) bulb (d) junction
30. 30.💡 A battery lights 4 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
31. 31.💡 A battery lights 3 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
32. 32.Which drawing is the symbol for a switch? (a) a plain rectangle (b) a circle with A inside (c) a line lifted at a gap (d) a circle with an X in it
33. 33.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is OFF, B is OFF, C is ON and D is ON. Does the bulb glow? (a) No (b) Yes
34. 34.What does a slide switch do? (a) flips up or down (b) closes when tipped over (c) springs back when let go (d) slides side to side
35. 35.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
36. 36.Which drawing is the symbol for a battery? (a) many long-short pairs (b) a circle with M inside (c) two equal parallel lines (d) a long and a short line
37. 37.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a graphite rod across the gap. Does the bulb glow? (a) Yes (b) No
38. 38.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
39. 39.🔍 Which is the odd one out? (a) build with an adult near (b) use small battery cells (c) dry your hands first (d) throw cells in a fire
40. 40.True or false: a push button slides side to side. (a) True (b) False

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