Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 425 · 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 drawing is the symbol for a junction? (a) a line lifted at a gap (b) a dot where wires meet (c) a circle with a cross (d) a plain rectangle
2. 2.🔦 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) Yes (b) No
3. 3.🔋 Does a television give electricity or use electricity? (a) gives electricity (b) uses electricity
4. 4.💡 Why is house wiring done in parallel? (a) to save copper only (b) each gets full voltage (c) so all go off together (d) to make bulbs dim
5. 5.🔋 What is a battery? (a) a kind of bulb (b) two or more cells joined (c) a switch with a lid (d) one single wire
6. 6.Which drawing is the symbol for a battery? (a) a long and a short line (b) a plain rectangle (c) two or more cell symbols (d) a small empty box
7. 7.💡 5 identical bulbs are in parallel and each bulb has its own switch on its path. 3 of the switches are OFF and the rest are ON. How many bulbs glow?
8. 8.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) ammeter (b) diode (c) bulb (d) motor
9. 9.🔌 Is a steel coin a conductor or an insulator? (a) an insulator (b) a conductor
10. 10.True or false: a plastic ruler is an insulator. (a) True (b) False
11. 11.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. Does bulb 2 glow? (a) Yes (b) No
12. 12.✏️ Why do engineers draw circuits with symbols? (a) symbols are heavier (b) quick and clear for all (c) to hide the circuit (d) to make it colourful
13. 13.🔁 What must there be for a current to flow? (a) one loose end (b) a complete loop (c) a plastic gap (d) a broken path
14. 14.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) switch (b) wire (c) cell (d) junction
15. 15.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
16. 16.✏️ In a circuit diagram, which part is drawn as a circle with an X in it? (a) ammeter (b) battery (c) bulb (d) wire
17. 17.What does a push button do? (a) closes when tipped over (b) slides side to side (c) stays where you flip it (d) works only while pressed
18. 18.True or false: a loudspeaker mainly makes sound. (a) True (b) False
19. 19.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
20. 20.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) only one (b) both of them (c) none (d) it does not matter
21. 21.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they get dimmer (c) they keep glowing (d) they explode
22. 22.🔗 Series or parallel circuit: “many paths for current”? (a) series (b) parallel
23. 23.🔋 2 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
24. 24.True or false: a toggle switch springs back when let go. (a) True (b) False
25. 25.🔍 Which is the odd one out? (a) a steel coin (b) a rubber band (c) a metal paper clip (d) an iron nail
26. 26.True or false: a wooden stick is an insulator. (a) False (b) True
27. 27.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
28. 28.⚡ What do we call a flow of electric charge through a wire? (a) friction (b) a magnet (c) electric current (d) sound
29. 29.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a plug top (b) a fuse or MCB (c) a bulb (d) a long wire
30. 30.⚠️ Why must we never touch switches with wet hands? (a) it is just untidy (b) water carries current (c) water makes it cold (d) it spoils the paint
31. 31.🔘 Which kind of switch slides side to side? (a) a reed switch (b) a slide switch (c) a push button (d) a toggle switch
32. 32.True or false: to build with an adult near is not safe. (a) False (b) True
33. 33.🔌 Which metal is used for most electric wires at home? (a) copper (b) rubber (c) plastic (d) glass
34. 34.What does a toggle switch do? (a) closes when tipped over (b) stays where you flip it (c) works only while pressed (d) closes near a magnet
35. 35.Which of these is not safe? (a) use a cable with cuts (b) take cells out after use (c) build with an adult near (d) keep drinks far away
36. 36.🔍 Which is the odd one out? (a) a toaster (b) a torch (c) a night lamp (d) a traffic signal
37. 37.🔦 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 rubber eraser. Does the bulb glow? (a) Yes (b) No
38. 38.Which drawing is the symbol for a resistor? (a) many long-short pairs (b) a straight line (c) a plain rectangle (d) one tall, one short bar
39. 39.True or false: a push button springs back when let go. (a) False (b) True
40. 40.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) capacitor (b) switch (c) wire (d) battery

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