Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 649 · 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 metal is used for most electric wires at home? (a) rubber (b) copper (c) glass (d) plastic
2. 2.🔦 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
3. 3.💡 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
4. 4.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) in series (c) not joined (d) by Wi-Fi
5. 5.Which of these gives us electricity? (a) a mobile phone (b) a computer (c) a television (d) a wind turbine
6. 6.🔍 Which is the odd one out? (a) a water heater (b) an exhaust fan (c) a table fan (d) a ceiling fan
7. 7.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
8. 8.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) parallel (b) series
9. 9.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the filament (b) the base (c) the glass (d) the switch
10. 10.Which of these is an insulator? (a) a steel spoon (b) a wooden stick (c) a safety pin (d) a brass key
11. 11.✏️ In a cell symbol, which line is the + terminal? (a) the longer line (b) the shorter line (c) both lines (d) neither line
12. 12.🔘 A bulb and a cell are joined through 4 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
13. 13.⚡ A cell changes stored chemical energy into which kind of energy? (a) sound energy (b) wind energy (c) electrical energy (d) nuclear energy
14. 14.True or false: to use small battery cells is safe. (a) False (b) True
15. 15.🔁 Is the circuit closed or open if all wires are joined? (a) closed (b) open
16. 16.✏️ In a circuit diagram, which part is drawn as two equal parallel lines? (a) ammeter (b) switch (c) capacitor (d) LED
17. 17.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 5 is taken out of its holder. How many bulbs glow?
18. 18.🔌 Most metals are good … (a) insulators (b) magnets only (c) conductors (d) batteries
19. 19.Which drawing is the symbol for an LED? (a) a circle with V inside (b) one tall, one short bar (c) triangle, bar and arrows (d) a dot where wires meet
20. 20.🔘 Which kind of switch flips up or down? (a) a reed switch (b) a toggle switch (c) a push button (d) a tilt switch
21. 21.🔦 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 aluminium foil. Does the bulb glow? (a) No (b) Yes
22. 22.What does a reed switch do? (a) slides side to side (b) springs back when let go (c) closes when tipped over (d) closes near a magnet
23. 23.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) a single current path (c) one bulb out, all go out (d) many paths for current
24. 24.True or false: aluminium foil is an insulator. (a) True (b) False
25. 25.💡 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
26. 26.True or false: a school bell mainly gives out light. (a) True (b) False
27. 27.🔍 Which is the odd one out? (a) a torch (b) a tube light (c) a school bell (d) a night lamp
28. 28.True or false: to build with an adult near is safe. (a) False (b) True
29. 29.⚠️ Is it safe to throw cells in a fire? (a) safe (b) not safe
30. 30.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
31. 31.Which of these mainly makes movement? (a) a traffic signal (b) an LED lamp (c) an electric drill (d) an electric kettle
32. 32.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. How many bulbs glow?
33. 33.Which of these mainly gives out heat? (a) an electric iron (b) a ceiling fan (c) a mixer grinder (d) a table fan
34. 34.Which drawing is the symbol for a battery? (a) a long and a short line (b) triangle, bar and arrows (c) many long-short pairs (d) a circle with A inside
35. 35.⚠️ Is it safe to poke things in a socket? (a) safe (b) not safe
36. 36.🔋 5 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
37. 37.🔦 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 an iron nail. Does the bulb glow? (a) No (b) Yes
38. 38.True or false: if a cell is taken out, the circuit is open and no current flows. (a) False (b) True
39. 39.Which of these is not safe? (a) build with an adult near (b) touch a fallen wire (c) keep drinks far away (d) dry your hands first
40. 40.True or false: to keep drinks far away is not safe. (a) True (b) False

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