Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 548 · 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: to stop if a part gets hot is safe. (a) True (b) False
2. 2.💡 4 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
3. 3.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) each gets the full volts (c) bulbs share the voltage (d) a single current path
4. 4.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
5. 5.🔋 3 identical 1.5 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
6. 6.Which of these is an insulator? (a) aluminium foil (b) a plastic straw (c) a metal paper clip (d) a steel spoon
7. 7.True or false: “a single current path” is true of a series circuit. (a) False (b) True
8. 8.⚡ What do we call a flow of electric charge through a wire? (a) friction (b) electric current (c) a magnet (d) sound
9. 9.⚡ Which tiny particles drift along a metal wire to carry the current? (a) water drops (b) dust particles (c) photons (d) electrons
10. 10.True or false: a circle with a cross is the symbol for a motor. (a) False (b) True
11. 11.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they explode (c) they keep glowing (d) they all go out
12. 12.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
13. 13.✏️ In a circuit diagram, wires are usually drawn as … (a) straight lines (b) dotted circles (c) little stars (d) wavy lines
14. 14.Which of these is a conductor? (a) aluminium foil (b) a rubber band (c) a ceramic cup (d) a plastic straw
15. 15.True or false: a buzzer mainly gives out heat. (a) False (b) True
16. 16.🔍 Which is the odd one out? (a) a rice cooker (b) an electric kettle (c) a tube light (d) an electric iron
17. 17.🔍 Which is the odd one out? (a) use mains for a project (b) use a cable with cuts (c) fly a kite near wires (d) use small battery cells
18. 18.🔦 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 a safety pin. Does the bulb glow? (a) No (b) Yes
19. 19.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
20. 20.🔌 Which part of a screwdriver should an electrician hold? (a) the metal tip (b) the steel shaft (c) the plastic handle (d) the bare end
21. 21.True or false: a copper wire is a conductor. (a) False (b) True
22. 22.Which of these uses electricity? (a) a generator (b) a computer (c) a cell (d) a battery
23. 23.💡 A battery lights 2 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
24. 24.True or false: a ceramic cup is a conductor. (a) False (b) True
25. 25.🔘 Which kind of switch slides side to side? (a) a push button (b) a tilt switch (c) a slide switch (d) a toggle switch
26. 26.✏️ Why do engineers draw circuits with symbols? (a) quick and clear for all (b) to make it colourful (c) to hide the circuit (d) symbols are heavier
27. 27.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) in series (c) not joined (d) in parallel
28. 28.True or false: a doorbell mainly makes movement. (a) False (b) True
29. 29.💡 A battery lights 4 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
30. 30.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put an iron nail across the gap. Does the bulb glow? (a) No (b) Yes
31. 31.🔍 Which is the odd one out? (a) an exhaust fan (b) a loudspeaker (c) a ceiling fan (d) an electric drill
32. 32.True or false: “many paths for current” is true of a series circuit. (a) True (b) False
33. 33.🔁 Is the circuit closed or open if the switch is ON? (a) open (b) closed
34. 34.🔋 How many volts does one ordinary torch cell give? (a) 0.5 V (b) 230 V (c) 1.5 V (d) 15 V
35. 35.Which of these is true of a parallel circuit? (a) used in house wiring (b) one bulb out, all go out (c) a single current path (d) a break stops every bulb
36. 36.Which drawing is the symbol for a voltmeter? (a) two or more cell symbols (b) a circle with M inside (c) a small empty box (d) a circle with V inside
37. 37.✏️ In a circuit diagram, which part is drawn as two equal parallel lines? (a) resistor (b) capacitor (c) voltmeter (d) ammeter
38. 38.True or false: a push button slides side to side. (a) True (b) False
39. 39.🔗 Series or parallel circuit: “used in house wiring”? (a) series (b) parallel
40. 40.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) one out, the rest glow (c) one bulb out, all go out (d) a break stops every bulb

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