Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 398 · 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.🔁 Is the circuit closed or open if a wire has come loose? (a) open (b) closed
2. 2.💡 6 identical bulbs are in parallel and each bulb has its own switch on its path. 1 of the switches is OFF and the rest are ON. How many bulbs glow?
3. 3.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) switch (b) capacitor (c) cell (d) LED
4. 4.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a ceramic cup across the gap. Does the bulb glow? (a) No (b) Yes
5. 5.Which of these is a conductor? (a) a plastic straw (b) a paper strip (c) a ceramic cup (d) a copper wire
6. 6.🔦 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) Yes (b) No
7. 7.🔋 Does a cell give electricity or use electricity? (a) uses electricity (b) gives electricity
8. 8.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. A gap in one wire is bridged by a rubber eraser. Does the bulb glow? (a) No (b) Yes
9. 9.What does a push button do? (a) springs back when let go (b) flips up or down (c) closes when tipped over (d) stays where you flip it
10. 10.🔦 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 steel spoon. Does the bulb glow? (a) Yes (b) No
11. 11.⚡ What does an exhaust fan mainly change electricity into? (a) heat (b) sound (c) light (d) movement
12. 12.🔋 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
13. 13.🔍 Which is the odd one out? (a) a copper wire (b) a brass key (c) a ceramic cup (d) a metal paper clip
14. 14.💡 A battery lights 4 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
15. 15.🔍 Which is the odd one out? (a) a woollen thread (b) a safety pin (c) a plastic straw (d) a glass marble
16. 16.💡 6 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 2 and 4 are taken out of their holders. How many bulbs glow?
17. 17.True or false: a safety pin is an insulator. (a) True (b) False
18. 18.🔍 Which is the odd one out? (a) touch a switch when wet (b) throw cells in a fire (c) use mains for a project (d) stay away from pylons
19. 19.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is ON, B is ON, C is ON and D is OFF. Does the bulb glow? (a) No (b) Yes
20. 20.💡 A battery lights 5 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
21. 21.Which of these mainly makes sound? (a) a traffic signal (b) a night lamp (c) a buzzer (d) a tube light
22. 22.⚡ A cell changes stored chemical energy into which kind of energy? (a) sound energy (b) nuclear energy (c) wind energy (d) electrical energy
23. 23.Which of these uses electricity? (a) a power station (b) a television (c) a cell (d) a bicycle dynamo
24. 24.True or false: if a wire is cut, the circuit is open and no current flows. (a) False (b) True
25. 25.Which drawing is the symbol for a motor? (a) a circle with a cross (b) a circle with M inside (c) a straight line (d) a circle with an X in it
26. 26.True or false: to climb an electric pole is safe. (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) No (b) Yes
28. 28.🔘 A cell and a bulb are joined to 2 side-by-side paths with one switch on each path — A and B (parallel). A is ON and B is OFF. Does the bulb glow? (a) No (b) Yes
29. 29.🔋 How many 2 V cells must be joined in series to give 8 V?
30. 30.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) the shorter line (c) the longer line (d) both lines
31. 31.💡 4 identical bulbs are joined in series with a 16 V battery (ideal wires). How many volts does each bulb get? =
32. 32.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) True (b) False
33. 33.Which of these is not safe? (a) fly kites in open fields (b) stay away from pylons (c) touch a switch when wet (d) keep drinks far away
34. 34.💡 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
35. 35.💡 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) dimmer (c) the same
36. 36.True or false: a torch mainly makes movement. (a) True (b) False
37. 37.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they explode (c) they get dimmer (d) they keep glowing
38. 38.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the glass (b) the base (c) the switch (d) the filament
39. 39.Which of these gives us electricity? (a) a water pump (b) a computer (c) a refrigerator (d) a generator
40. 40.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) sound energy (b) light energy (c) chemical energy (d) movement energy

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