Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 651 · 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.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a copper wire across the gap. Does the bulb glow? (a) Yes (b) No
2. 2.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
3. 3.True or false: if a wire has come loose, the circuit is closed and current flows. (a) True (b) False
4. 4.🔋 What should you do with used-up cells? (a) give them for recycling (b) cut them open (c) bury them in soil (d) throw them in a fire
5. 5.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a metal paper clip across the gap. Does the bulb glow? (a) Yes (b) No
6. 6.🔍 Which is the odd one out? (a) a night lamp (b) a street light (c) a torch (d) a buzzer
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.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) pour water on them (b) shout for an adult (c) pull them by the hand (d) wait and watch
9. 9.What does a tilt switch do? (a) closes when tipped over (b) stays where you flip it (c) slides side to side (d) flips up or down
10. 10.🔘 A bulb and a cell are joined through 5 switches on 5 side-by-side paths, one switch on each path (parallel). What is the smallest number of switches that must be ON to light the bulb?
11. 11.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) series (b) parallel
12. 12.True or false: to stop if a part gets hot is safe. (a) True (b) False
13. 13.🔦 A circuit has a new cell, a bulb with a broken filament 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
14. 14.Which of these mainly gives out light? (a) a siren (b) a buzzer (c) a street light (d) an electric drill
15. 15.🔋 How many 1.2 V cells must be joined in series to give 8.4 V?
16. 16.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they get dimmer (c) they explode (d) they keep glowing
17. 17.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
18. 18.💡 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
19. 19.💡 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
20. 20.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a bulb (b) a long wire (c) a fuse or MCB (d) a plug top
21. 21.True or false: two equal parallel lines is the symbol for a capacitor. (a) False (b) True
22. 22.Which drawing is the symbol for an ammeter? (a) a circle with M inside (b) two equal parallel lines (c) many long-short pairs (d) a circle with A inside
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 single current path” is true of a series circuit. (a) False (b) True
25. 25.True or false: a small empty box is the symbol for a resistor. (a) False (b) True
26. 26.Which drawing is the symbol for a bulb? (a) a dot where wires meet (b) a plain rectangle (c) triangle, bar and arrows (d) a circle with a cross
27. 27.✏️ In a circuit diagram, which part is drawn as a dot where wires meet? (a) capacitor (b) bulb (c) junction (d) battery
28. 28.✏️ Why do engineers draw circuits with symbols? (a) to make it colourful (b) quick and clear for all (c) to hide the circuit (d) symbols are heavier
29. 29.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
30. 30.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is OFF, B is ON, C is OFF and D is ON. Does the bulb glow? (a) Yes (b) No
31. 31.🔘 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 OFF and C is ON. Does the bulb glow? (a) Yes (b) No
32. 32.⚠️ Is it safe to use mains for a project? (a) not safe (b) safe
33. 33.✏️ In a circuit diagram, wires are usually drawn as … (a) wavy lines (b) straight lines (c) dotted circles (d) little stars
34. 34.🔍 Which is the odd one out? (a) a safety pin (b) a plastic ruler (c) a graphite rod (d) an iron nail
35. 35.🔌 Most metals are good … (a) insulators (b) batteries (c) conductors (d) magnets only
36. 36.True or false: if the switch is OFF, the circuit is closed and current flows. (a) True (b) False
37. 37.Which of these gives us electricity? (a) a refrigerator (b) an air conditioner (c) a solar panel (d) a television
38. 38.True or false: to poke things in a socket is not safe. (a) False (b) True
39. 39.🔗 Series or parallel circuit: “one out, the rest glow”? (a) series (b) parallel
40. 40.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) False (b) True

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