Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 693 · 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 of these mainly gives out heat? (a) an electric drill (b) a tube light (c) a loudspeaker (d) a water heater
2. 2.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is OFF and B is OFF. Does the bulb glow? (a) Yes (b) No
3. 3.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) capacitor (b) ammeter (c) cell (d) diode
4. 4.Which of these is safe? (a) fly a kite near wires (b) touch a switch when wet (c) stay away from pylons (d) touch a fallen wire
5. 5.Which drawing is the symbol for an ammeter? (a) two or more cell symbols (b) a circle with A inside (c) a circle with a cross (d) a long and a short line
6. 6.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) switch (b) cell (c) LED (d) bulb
7. 7.🔋 6 identical 2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
8. 8.Which of these is a conductor? (a) a brass key (b) a cotton thread (c) a plastic ruler (d) a rubber eraser
9. 9.⚡ A cell changes stored chemical energy into which kind of energy? (a) electrical energy (b) sound energy (c) wind energy (d) nuclear energy
10. 10.🔋 A 9 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
11. 11.True or false: a doorbell mainly makes movement. (a) True (b) False
12. 12.💡 A battery lights 4 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
13. 13.🔋 What is a battery? (a) two or more cells joined (b) a kind of bulb (c) one single wire (d) a switch with a lid
14. 14.Which of these uses electricity? (a) a cell (b) a television (c) a bicycle dynamo (d) a solar panel
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 ON, B is ON and C is OFF. Does the bulb glow? (a) No (b) Yes
16. 16.🔁 What must there be for a current to flow? (a) a broken path (b) a complete loop (c) a plastic gap (d) one loose end
17. 17.True or false: a circle with a cross is the symbol for a bulb. (a) True (b) False
18. 18.Which of these uses electricity? (a) a cell (b) a computer (c) a solar panel (d) a battery
19. 19.🔌 Which part of a screwdriver should an electrician hold? (a) the metal tip (b) the plastic handle (c) the bare end (d) the steel shaft
20. 20.True or false: a wooden stick is an insulator. (a) False (b) True
21. 21.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) so all go off together (c) each gets full voltage (d) to save copper only
22. 22.⚡ What does an LED lamp mainly change electricity into? (a) light (b) movement (c) heat (d) sound
23. 23.True or false: a tube light mainly makes movement. (a) False (b) True
24. 24.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) sound energy (b) chemical energy (c) movement energy (d) light energy
25. 25.🔦 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 a brass key. Does the bulb glow? (a) No (b) Yes
26. 26.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) False (b) True
27. 27.💡 3 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
28. 28.🔌 Is a plastic straw a conductor or an insulator? (a) a conductor (b) an insulator
29. 29.Which of these is true of a series circuit? (a) many paths for current (b) one out, the rest glow (c) a break stops every bulb (d) each gets the full volts
30. 30.True or false: a toggle switch slides side to side. (a) True (b) False
31. 31.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
32. 32.⚠️ Why must we never touch switches with wet hands? (a) it is just untidy (b) it spoils the paint (c) water makes it cold (d) water carries current
33. 33.🔗 Series or parallel circuit: “a break stops every bulb”? (a) parallel (b) series
34. 34.Which of these mainly makes movement? (a) a doorbell (b) a room heater (c) an electric drill (d) a buzzer
35. 35.💡 2 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 2 is taken out of its holder. Does bulb 1 glow? (a) No (b) Yes
36. 36.⚡ Which tiny particles drift along a metal wire to carry the current? (a) water drops (b) dust particles (c) photons (d) electrons
37. 37.⚡ A solar panel changes which kind of energy into electricity? (a) wind energy (b) light energy (c) chemical energy (d) sound energy
38. 38.True or false: if the switch is ON, the circuit is closed and current flows. (a) True (b) False
39. 39.✏️ In a circuit diagram, wires are usually drawn as … (a) wavy lines (b) dotted circles (c) little stars (d) straight lines
40. 40.Which of these mainly makes movement? (a) a water heater (b) a torch (c) a buzzer (d) a ceiling fan

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