Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 482 · 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.🔗 Series or parallel circuit: “used in house wiring”? (a) series (b) parallel
2. 2.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) one bulb out, all go out (c) a single current path (d) one out, the rest glow
3. 3.🔍 Which is the odd one out? (a) a water heater (b) a traffic signal (c) a rice cooker (d) an electric iron
4. 4.🔦 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) No (b) Yes
5. 5.💡 4 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?
6. 6.💡 2 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
7. 7.🔦 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
8. 8.🔦 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
9. 9.⚡ What does a torch mainly change electricity into? (a) sound (b) light (c) movement (d) heat
10. 10.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) to save copper only (c) each gets full voltage (d) so all go off together
11. 11.⚡ A fan changes electrical energy mainly into which kind of energy? (a) light energy (b) movement energy (c) sound energy (d) chemical energy
12. 12.🔍 Which is the odd one out? (a) a traffic signal (b) an LED lamp (c) a tube light (d) a doorbell
13. 13.True or false: if a cell is taken out, the circuit is closed and current flows. (a) True (b) False
14. 14.💡 In a series circuit, how many paths does the current have? (a) none (b) one (c) two (d) one for each bulb
15. 15.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a brass key across the gap. Does the bulb glow? (a) No (b) Yes
16. 16.💡 4 identical bulbs are joined in series with a 12 V battery (ideal wires). How many volts does each bulb get? =
17. 17.Which of these is safe? (a) take cells out after use (b) use mains for a project (c) touch a switch when wet (d) climb an electric pole
18. 18.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) in parallel (c) by Wi-Fi (d) in series
19. 19.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) chemical energy (b) light energy (c) sound energy (d) movement energy
20. 20.Which of these is not safe? (a) stop if a part gets hot (b) use small battery cells (c) poke things in a socket (d) fly kites in open fields
21. 21.Which of these means the circuit is closed? (a) a cell is taken out (b) the switch is ON (c) the bulb is unscrewed (d) a wire has come loose
22. 22.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
23. 23.True or false: if a wire is cut, the circuit is open and no current flows. (a) False (b) True
24. 24.🔍 Which is the odd one out? (a) a brass key (b) a copper wire (c) a metal paper clip (d) a plastic ruler
25. 25.🔘 Which kind of switch stays where you flip it? (a) a slide switch (b) a push button (c) a toggle switch (d) a reed switch
26. 26.What does a push button do? (a) springs back when let go (b) stays where you flip it (c) flips up or down (d) closes near a magnet
27. 27.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a dry cork across the gap. Does the bulb glow? (a) No (b) Yes
28. 28.🔦 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 cotton thread. Does the bulb glow? (a) Yes (b) No
29. 29.⚡ A cell changes stored chemical energy into which kind of energy? (a) electrical energy (b) wind energy (c) nuclear energy (d) sound energy
30. 30.⚠️ 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
31. 31.💡 5 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
32. 32.🔌 A gap of dry air between two wires acts as … (a) a conductor (b) a cell (c) an insulator (d) a switch that is ON
33. 33.🔌 Most metals are good … (a) magnets only (b) conductors (c) insulators (d) batteries
34. 34.🔘 A bulb and a cell are joined through 2 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
35. 35.Which of these is not safe? (a) take cells out after use (b) fly a kite near wires (c) use small battery cells (d) build with an adult near
36. 36.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
37. 37.🔍 Which is the odd one out? (a) fly a kite near wires (b) keep drinks far away (c) use mains for a project (d) climb an electric pole
38. 38.Which drawing is the symbol for a capacitor? (a) two equal parallel lines (b) triangle, bar and arrows (c) many long-short pairs (d) a plain rectangle
39. 39.🔌 Which part of a screwdriver should an electrician hold? (a) the bare end (b) the steel shaft (c) the plastic handle (d) the metal tip
40. 40.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) True (b) False

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