Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 178 · 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.⚠️ About how many volts do home sockets in India supply? (a) 9 V (b) 1.5 V (c) 12 V (d) 230 V
2. 2.🔗 Series or parallel circuit: “each gets the full volts”? (a) parallel (b) series
3. 3.🔋 Does a television give electricity or use electricity? (a) gives electricity (b) uses electricity
4. 4.True or false: a brass key is a conductor. (a) True (b) False
5. 5.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True
6. 6.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) True (b) False
7. 7.🔍 Which is the odd one out? (a) touch a fallen wire (b) fly a kite near wires (c) stop if a part gets hot (d) open a phone charger
8. 8.True or false: an electric iron mainly gives out light. (a) True (b) False
9. 9.⚡ A solar panel changes which kind of energy into electricity? (a) light energy (b) wind energy (c) chemical energy (d) sound energy
10. 10.True or false: a tilt switch works only while pressed. (a) True (b) False
11. 11.True or false: on a cell, “the flat end” means the + (positive) end. (a) False (b) True
12. 12.🔍 Which is the odd one out? (a) touch a switch when wet (b) dry your hands first (c) use small battery cells (d) stay away from pylons
13. 13.💡 3 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
14. 14.💡 Why is house wiring done in parallel? (a) so all go off together (b) to make bulbs dim (c) each gets full voltage (d) to save copper only
15. 15.🔘 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 OFF, B is ON and C is ON. Does the bulb glow? (a) Yes (b) No
16. 16.🔁 Is the circuit closed or open if all wires are joined? (a) closed (b) open
17. 17.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
18. 18.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) ammeter (b) bulb (c) battery (d) voltmeter
19. 19.Which of these is a conductor? (a) a wooden stick (b) a steel spoon (c) a rubber band (d) a glass marble
20. 20.🔘 Which kind of switch flips up or down? (a) a toggle switch (b) a tilt switch (c) a push button (d) a slide switch
21. 21.🔘 A cell and a bulb are joined to 4 side-by-side paths with one switch on each path — A, B, C and D (parallel). A is OFF, B is OFF, C is OFF and D is OFF. Does the bulb glow? (a) Yes (b) No
22. 22.✏️ In a circuit diagram, which part is drawn as two equal parallel lines? (a) cell (b) voltmeter (c) capacitor (d) switch
23. 23.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) the shorter line (c) both lines (d) the longer line
24. 24.🔌 Which metal is used for most electric wires at home? (a) plastic (b) glass (c) copper (d) rubber
25. 25.✏️ In a circuit diagram, wires are usually drawn as … (a) straight lines (b) dotted circles (c) wavy lines (d) little stars
26. 26.🔌 Is a plastic straw a conductor or an insulator? (a) a conductor (b) an insulator
27. 27.💡 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. Bulbs 3 and 4 are taken out of their holders. Does bulb 6 glow? (a) Yes (b) No
28. 28.True or false: to open a phone charger is safe. (a) False (b) True
29. 29.🔘 A bulb and a cell are joined through 6 switches on 6 side-by-side paths, one switch on each path (parallel). What is the smallest number of switches that must be ON to light the bulb?
30. 30.🔌 Is a cotton thread a conductor or an insulator? (a) a conductor (b) an insulator
31. 31.Which of these is true of a parallel circuit? (a) a single current path (b) bulbs share the voltage (c) many paths for current (d) a break stops every bulb
32. 32.Which of these is an insulator? (a) aluminium foil (b) a metal paper clip (c) a safety pin (d) a paper strip
33. 33.True or false: a buzzer mainly makes sound. (a) True (b) False
34. 34.🔋 What is a battery? (a) a kind of bulb (b) one single wire (c) a switch with a lid (d) two or more cells joined
35. 35.🔁 Is the circuit closed or open if the loop is complete? (a) open (b) closed
36. 36.🔍 Which is the odd one out? (a) a night lamp (b) a tube light (c) a traffic signal (d) an electric kettle
37. 37.✏️ Why do engineers draw circuits with symbols? (a) to make it colourful (b) quick and clear for all (c) symbols are heavier (d) to hide the circuit
38. 38.🔋 How many 3 V cells must be joined in series to give 24 V?
39. 39.💡 A battery lights 3 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
40. 40.⚡ What does a doorbell mainly change electricity into? (a) movement (b) sound (c) light (d) heat

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