Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 612 · 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.True or false: if the switch is OFF, the circuit is open and no current flows. (a) True (b) False
2. 2.⚡ What does a night lamp mainly change electricity into? (a) light (b) sound (c) heat (d) movement
3. 3.True or false: to stop if a part gets hot is safe. (a) False (b) True
4. 4.🔁 Is the circuit closed or open if the loop is complete? (a) closed (b) open
5. 5.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
6. 6.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is ON and B is OFF. Does the bulb glow? (a) Yes (b) No
7. 7.🔋 Does a television give electricity or use electricity? (a) gives electricity (b) uses electricity
8. 8.True or false: a reed switch flips up or down. (a) True (b) False
9. 9.Which of these is safe? (a) touch a switch when wet (b) stop if a part gets hot (c) use a cable with cuts (d) touch a fallen wire
10. 10.🔍 Which is the odd one out? (a) build with an adult near (b) touch a switch when wet (c) fly kites in open fields (d) stay away from pylons
11. 11.🔌 Why are electric wires covered in plastic? (a) to make them heavy (b) plastic is an insulator (c) plastic makes current (d) plastic is a conductor
12. 12.⚠️ About how many volts do home sockets in India supply? (a) 12 V (b) 9 V (c) 1.5 V (d) 230 V
13. 13.True or false: a dot where wires meet is the symbol for a battery. (a) False (b) True
14. 14.✏️ In a circuit diagram, wires are usually drawn as … (a) dotted circles (b) wavy lines (c) straight lines (d) little stars
15. 15.🔗 Series or parallel circuit: “a single current path”? (a) series (b) parallel
16. 16.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. Does the bulb glow? (a) No (b) Yes
17. 17.🔘 Which kind of switch closes near a magnet? (a) a push button (b) a slide switch (c) a toggle switch (d) a reed switch
18. 18.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
19. 19.Which of these means the circuit is open? (a) all wires are joined (b) the loop is complete (c) the bulb is unscrewed (d) the switch is ON
20. 20.🔍 Which is the odd one out? (a) a toaster (b) an electric iron (c) a buzzer (d) a rice cooker
21. 21.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is OFF, B is ON and C is OFF. Does the bulb glow? (a) No (b) Yes
22. 22.🔍 Which is the odd one out? (a) an electric toy car (b) a tube light (c) an electric drill (d) a table fan
23. 23.🔘 A cell and a bulb are joined to 3 side-by-side paths with one switch on each path — A, B and C (parallel). A is ON, B is ON and C is ON. Does the bulb glow? (a) No (b) Yes
24. 24.Which of these is an insulator? (a) a steel spoon (b) aluminium foil (c) a brass key (d) a woollen thread
25. 25.🔁 Is the circuit closed or open if a cell is taken out? (a) closed (b) open
26. 26.🔦 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
27. 27.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) not joined (c) in series (d) in parallel
28. 28.True or false: a traffic signal mainly gives out light. (a) True (b) False
29. 29.True or false: to touch a fallen wire is safe. (a) False (b) True
30. 30.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
31. 31.💡 4 identical bulbs are joined in series with a 4 V battery (ideal wires). How many volts does each bulb get? =
32. 32.🔍 Which is the odd one out? (a) a mixer grinder (b) a street light (c) a night lamp (d) a traffic signal
33. 33.Which of these is true of a series circuit? (a) own switch for each bulb (b) many paths for current (c) one bulb out, all go out (d) used in house wiring
34. 34.🔗 Series or parallel circuit: “a break stops every bulb”? (a) parallel (b) series
35. 35.True or false: a circle with A inside is the symbol for an ammeter. (a) False (b) True
36. 36.Which drawing is the symbol for a motor? (a) a circle with A inside (b) one tall, one short bar (c) two or more cell symbols (d) a circle with M inside
37. 37.True or false: a doorbell mainly gives out heat. (a) False (b) True
38. 38.💡 2 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
39. 39.🔁 Is the circuit closed or open if a wire is cut? (a) open (b) closed
40. 40.💡 A battery lights 5 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer

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