Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 557 · 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.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the glass (b) the filament (c) the base (d) the switch
2. 2.True or false: “used in house wiring” is true of a parallel circuit. (a) True (b) False
3. 3.✏️ Why do engineers draw circuits with symbols? (a) symbols are heavier (b) to hide the circuit (c) quick and clear for all (d) to make it colourful
4. 4.🔘 Which kind of switch works only while pressed? (a) a reed switch (b) a tilt switch (c) a push button (d) a slide switch
5. 5.Which of these is not safe? (a) build with an adult near (b) keep drinks far away (c) open a phone charger (d) take cells out after use
6. 6.💡 3 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 3 is taken out of its holder. How many bulbs glow?
7. 7.Which of these is safe? (a) use small battery cells (b) throw cells in a fire (c) open a phone charger (d) fly a kite near wires
8. 8.True or false: a wooden stick is a conductor. (a) False (b) True
9. 9.True or false: a toggle switch closes when tipped over. (a) False (b) True
10. 10.🔍 Which is the odd one out? (a) a traffic signal (b) a night lamp (c) an LED lamp (d) a doorbell
11. 11.⚡ What does a street light mainly change electricity into? (a) light (b) sound (c) heat (d) movement
12. 12.Which of these mainly gives out heat? (a) an exhaust fan (b) a night lamp (c) a school bell (d) a water heater
13. 13.🔋 A 9 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
14. 14.Which of these is true of a parallel circuit? (a) a single current path (b) one out, the rest glow (c) a break stops every bulb (d) one bulb out, all go out
15. 15.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
16. 16.Which of these uses electricity? (a) a generator (b) a cell (c) a washing machine (d) a power station
17. 17.True or false: to fly kites in open fields is not safe. (a) True (b) False
18. 18.🔘 A cell and a bulb are joined to two side-by-side paths: path 1 has switches A and B one after another, path 2 has switch C. A is ON, B is OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
19. 19.True or false: a slide switch slides side to side. (a) True (b) False
20. 20.✏️ In a circuit diagram, wires are usually drawn as … (a) wavy lines (b) little stars (c) dotted circles (d) straight lines
21. 21.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) series (b) parallel
22. 22.🔌 Why are electric wires covered in plastic? (a) plastic makes current (b) to make them heavy (c) plastic is a conductor (d) plastic is an insulator
23. 23.🔍 Which is the odd one out? (a) a steel spoon (b) a paper strip (c) a glass marble (d) a rubber band
24. 24.🔍 Which is the odd one out? (a) keep drinks far away (b) build with an adult near (c) poke things in a socket (d) dry your hands first
25. 25.Which of these is safe? (a) open a phone charger (b) use a cable with cuts (c) throw cells in a fire (d) dry your hands first
26. 26.💡 3 identical bulbs are in parallel and each bulb has its own switch on its path. 2 of the switches are OFF and the rest are ON. How many bulbs glow?
27. 27.🔍 Which is the odd one out? (a) a siren (b) a room heater (c) a water heater (d) a toaster
28. 28.True or false: “a single current path” is true of a series circuit. (a) False (b) True
29. 29.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is ON, B is ON and C is ON. Does the bulb glow? (a) No (b) Yes
30. 30.Which of these is not safe? (a) build with an adult near (b) stay away from pylons (c) use small battery cells (d) fly a kite near wires
31. 31.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
32. 32.🔁 Is the circuit closed or open if a wire has come loose? (a) closed (b) open
33. 33.🔘 Which kind of switch flips up or down? (a) a toggle switch (b) a slide switch (c) a tilt switch (d) a reed switch
34. 34.✏️ In a circuit diagram, which part is drawn as a line lifted at a gap? (a) switch (b) battery (c) LED (d) resistor
35. 35.🔍 Which is the odd one out? (a) a steel coin (b) a woollen thread (c) a wooden stick (d) a paper strip
36. 36.🔘 Which kind of switch springs back when let go? (a) a toggle switch (b) a reed switch (c) a slide switch (d) a push button
37. 37.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) resistor (b) battery (c) diode (d) junction
38. 38.🔁 Is the circuit closed or open if the loop is complete? (a) open (b) closed
39. 39.🔗 Series or parallel circuit: “many paths for current”? (a) series (b) parallel
40. 40.True or false: a tube light mainly gives out light. (a) False (b) True

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