Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 354 · 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.🔌 Is a woollen thread a conductor or an insulator? (a) an insulator (b) a conductor
2. 2.Which drawing is the symbol for a motor? (a) a circle with V inside (b) two or more cell symbols (c) a circle with M inside (d) a line lifted at a gap
3. 3.Which drawing is the symbol for a bulb? (a) one tall, one short bar (b) a small empty box (c) a circle with A inside (d) a circle with an X in it
4. 4.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) parallel (b) series
5. 5.🔍 Which is the odd one out? (a) a graphite rod (b) a rubber band (c) a ceramic cup (d) a plastic ruler
6. 6.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they explode (c) they get dimmer (d) they keep glowing
7. 7.Which of these is true of a series circuit? (a) one out, the rest glow (b) used in house wiring (c) own switch for each bulb (d) a break stops every bulb
8. 8.🔋 What is a battery? (a) one single wire (b) a kind of bulb (c) two or more cells joined (d) a switch with a lid
9. 9.🔍 Which is the odd one out? (a) a torch (b) a loudspeaker (c) a night lamp (d) a tube light
10. 10.⚠️ Is it safe to climb an electric pole? (a) not safe (b) safe
11. 11.Which of these means the circuit is closed? (a) the switch is OFF (b) a cell is taken out (c) all wires are joined (d) a wire is cut
12. 12.✏️ Why do engineers draw circuits with symbols? (a) symbols are heavier (b) to make it colourful (c) quick and clear for all (d) to hide the circuit
13. 13.Which of these mainly makes sound? (a) a buzzer (b) a tube light (c) a rice cooker (d) an electric kettle
14. 14.True or false: a line lifted at a gap is the symbol for a switch. (a) False (b) True
15. 15.What does a toggle switch do? (a) springs back when let go (b) stays where you flip it (c) closes when tipped over (d) works only while pressed
16. 16.Which of these is true of a series circuit? (a) a single current path (b) own switch for each bulb (c) many paths for current (d) each gets the full volts
17. 17.🔋 Does a generator give electricity or use electricity? (a) uses electricity (b) gives electricity
18. 18.🔌 Is aluminium foil a conductor or an insulator? (a) an insulator (b) a conductor
19. 19.🔌 Is a steel spoon a conductor or an insulator? (a) an insulator (b) a conductor
20. 20.🔍 Which is the odd one out? (a) a cotton thread (b) a paper strip (c) a rubber eraser (d) a metal paper clip
21. 21.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a wooden stick across the gap. Does the bulb glow? (a) Yes (b) No
22. 22.Which of these means the circuit is open? (a) a wire has come loose (b) the loop is complete (c) the switch is ON (d) all wires are joined
23. 23.🔁 What must there be for a current to flow? (a) a plastic gap (b) a broken path (c) one loose end (d) a complete loop
24. 24.True or false: two or more cell symbols is the symbol for a battery. (a) False (b) True
25. 25.🔘 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
26. 26.🔍 Which is the odd one out? (a) poke things in a socket (b) use a cable with cuts (c) dry your hands first (d) open a phone charger
27. 27.💡 6 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
28. 28.🔍 Which is the odd one out? (a) a metal paper clip (b) an iron nail (c) a plastic ruler (d) a graphite rod
29. 29.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
30. 30.True or false: if the loop is complete, the circuit is closed and current flows. (a) True (b) False
31. 31.🔌 Is a plastic straw a conductor or an insulator? (a) a conductor (b) an insulator
32. 32.True or false: a night lamp mainly gives out heat. (a) True (b) False
33. 33.⚠️ Is it safe to use mains for a project? (a) safe (b) not safe
34. 34.🔗 Series or parallel circuit: “a single current path”? (a) series (b) parallel
35. 35.🔌 Is a copper wire a conductor or an insulator? (a) a conductor (b) an insulator
36. 36.🔋 How many volts does one ordinary torch cell give? (a) 230 V (b) 1.5 V (c) 15 V (d) 0.5 V
37. 37.🔘 Which kind of switch slides side to side? (a) a toggle switch (b) a reed switch (c) a slide switch (d) a push button
38. 38.✏️ In a circuit diagram, which part is drawn as two equal parallel lines? (a) battery (b) switch (c) capacitor (d) ammeter
39. 39.🔦 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 dry cork. Does the bulb glow? (a) No (b) Yes
40. 40.💡 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. Bulbs 2 and 3 are taken out of their holders. How many bulbs glow?

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