Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 100 · 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 is the odd one out? (a) poke things in a socket (b) dry your hands first (c) use small battery cells (d) build with an adult near
2. 2.💡 2 identical bulbs are joined in series with a 5 V battery (ideal wires). How many volts does each bulb get? =
3. 3.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a parallel circuit (b) a short circuit (c) a safe circuit (d) an open circuit
4. 4.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) capacitor (b) diode (c) ammeter (d) motor
5. 5.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
6. 6.True or false: to throw cells in a fire is safe. (a) False (b) True
7. 7.Which of these is not safe? (a) poke things in a socket (b) keep drinks far away (c) stay away from pylons (d) dry your hands first
8. 8.✏️ 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
9. 9.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they keep glowing (c) they all go out (d) they get dimmer
10. 10.🔘 Which kind of switch works only while pressed? (a) a push button (b) a tilt switch (c) a reed switch (d) a slide switch
11. 11.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) so all go off together (c) to make bulbs dim (d) to save copper only
12. 12.True or false: a loudspeaker mainly makes movement. (a) True (b) False
13. 13.💡 A battery lights 3 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
14. 14.🔁 Is the circuit closed or open if the switch is OFF? (a) open (b) closed
15. 15.💡 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) Yes (b) No
16. 16.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) False (b) True
17. 17.💡 In a series circuit, how many paths does the current have? (a) none (b) one for each bulb (c) two (d) one
18. 18.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a rubber band across the gap. Does the bulb glow? (a) Yes (b) No
19. 19.Which of these gives us electricity? (a) a refrigerator (b) a television (c) a power station (d) a mobile phone
20. 20.⚠️ Is it safe to throw cells in a fire? (a) not safe (b) safe
21. 21.True or false: a circle with an X in it is the symbol for a bulb. (a) False (b) True
22. 22.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) series (b) parallel
23. 23.🔁 Is the circuit closed or open if a wire is cut? (a) closed (b) open
24. 24.True or false: to throw cells in a fire is not safe. (a) False (b) True
25. 25.⚠️ Is it safe to keep drinks far away? (a) not safe (b) safe
26. 26.⚡ Which tiny particles drift along a metal wire to carry the current? (a) dust particles (b) electrons (c) water drops (d) photons
27. 27.🔁 What must there be for a current to flow? (a) one loose end (b) a plastic gap (c) a complete loop (d) a broken path
28. 28.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
29. 29.🔌 Why are electric wires covered in plastic? (a) plastic makes current (b) plastic is a conductor (c) to make them heavy (d) plastic is an insulator
30. 30.Which of these means the circuit is closed? (a) a cell is taken out (b) the bulb is unscrewed (c) all wires are joined (d) a wire has come loose
31. 31.🔋 2 identical 3 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
32. 32.🔦 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 metal paper clip. Does the bulb glow? (a) No (b) Yes
33. 33.🔍 Which is the odd one out? (a) a torch (b) a traffic signal (c) a tube light (d) a water heater
34. 34.💡 4 identical bulbs are joined in series with a 10 V battery (ideal wires). How many volts does each bulb get? =
35. 35.🔋 4 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)? =
36. 36.True or false: a circle with A inside is the symbol for an ammeter. (a) True (b) False
37. 37.🔘 Which kind of switch closes when tipped over? (a) a slide switch (b) a tilt switch (c) a reed switch (d) a toggle switch
38. 38.Which drawing is the symbol for a battery? (a) a circle with an X in it (b) a circle with A inside (c) a small empty box (d) two or more cell symbols
39. 39.Which of these is a conductor? (a) a steel spoon (b) a woollen thread (c) a ceramic cup (d) a rubber eraser
40. 40.True or false: a brass key is a conductor. (a) False (b) True

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