Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 51 · 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) stay away from pylons (c) fly a kite near wires (d) open a phone charger
2. 2.🔗 Series or parallel circuit: “used in house wiring”? (a) series (b) parallel
3. 3.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
4. 4.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they keep glowing (c) they get dimmer (d) they all go out
5. 5.💡 A battery lights 3 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
6. 6.💡 3 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
7. 7.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is ON, B is OFF and C is ON. Does the bulb glow? (a) No (b) Yes
8. 8.💡 3 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
9. 9.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in series (b) not joined (c) in parallel (d) by Wi-Fi
10. 10.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
11. 11.🔦 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) No (b) Yes
12. 12.Which of these is not safe? (a) build with an adult near (b) fly kites in open fields (c) fly a kite near wires (d) use small battery cells
13. 13.Which of these mainly gives out heat? (a) an exhaust fan (b) a street light (c) a ceiling fan (d) a toaster
14. 14.🔋 Does a washing machine give electricity or use electricity? (a) gives electricity (b) uses electricity
15. 15.💡 Why is house wiring done in parallel? (a) so all go off together (b) to make bulbs dim (c) to save copper only (d) each gets full voltage
16. 16.🔌 Is aluminium foil a conductor or an insulator? (a) an insulator (b) a conductor
17. 17.Which of these is a conductor? (a) a paper strip (b) a plastic ruler (c) a cotton thread (d) a steel coin
18. 18.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. Does the bulb glow? (a) No (b) Yes
19. 19.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) bulb (b) LED (c) wire (d) battery
20. 20.🔌 Is an iron nail a conductor or an insulator? (a) a conductor (b) an insulator
21. 21.True or false: a safety pin is an insulator. (a) True (b) False
22. 22.🔦 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
23. 23.🔍 Which is the odd one out? (a) a graphite rod (b) a glass marble (c) aluminium foil (d) a metal paper clip
24. 24.🔋 5 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)? =
25. 25.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) False (b) True
26. 26.🔍 Which is the odd one out? (a) a table fan (b) a torch (c) a street light (d) a night lamp
27. 27.⚠️ Why must we never touch switches with wet hands? (a) it spoils the paint (b) it is just untidy (c) water carries current (d) water makes it cold
28. 28.True or false: “used in house wiring” is true of a parallel circuit. (a) True (b) False
29. 29.True or false: a slide switch slides side to side. (a) False (b) True
30. 30.Which drawing is the symbol for a motor? (a) a straight line (b) two or more cell symbols (c) a circle with M inside (d) a small empty box
31. 31.True or false: a plain rectangle is the symbol for a switch. (a) False (b) True
32. 32.Which of these is true of a series circuit? (a) each gets the full volts (b) one out, the rest glow (c) many paths for current (d) one bulb out, all go out
33. 33.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) the longer line (c) both lines (d) neither line
34. 34.💡 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?
35. 35.💡 5 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 3 and 4 are taken out of their holders. How many bulbs glow?
36. 36.🔌 Is a steel spoon a conductor or an insulator? (a) a conductor (b) an insulator
37. 37.🔍 Which is the odd one out? (a) a steel spoon (b) a metal paper clip (c) a steel coin (d) a wooden stick
38. 38.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
39. 39.What does a tilt switch do? (a) springs back when let go (b) closes when tipped over (c) works only while pressed (d) stays where you flip it
40. 40.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) False (b) True

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