Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 282 · 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.True or false: on a cell, “the flat end” means the + (positive) end. (a) True (b) False
2. 2.True or false: a tilt switch stays where you flip it. (a) True (b) False
3. 3.True or false: to build with an adult near is safe. (a) False (b) True
4. 4.✏️ In a circuit diagram, which part is drawn as a straight line? (a) LED (b) motor (c) wire (d) voltmeter
5. 5.💡 5 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
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 steel coin. Does the bulb glow? (a) Yes (b) No
7. 7.True or false: aluminium foil is a conductor. (a) False (b) True
8. 8.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
9. 9.🔁 Is the circuit closed or open if a wire is cut? (a) closed (b) open
10. 10.🔁 What must there be for a current to flow? (a) a broken path (b) one loose end (c) a plastic gap (d) a complete loop
11. 11.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) in series (c) in parallel (d) by Wi-Fi
12. 12.🔋 How many 3 V cells must be joined in series to give 15 V?
13. 13.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
14. 14.🔦 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) Yes (b) No
15. 15.True or false: a rice cooker mainly gives out light. (a) False (b) True
16. 16.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) False (b) True
17. 17.💡 4 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
18. 18.🔘 When a switch is ON, the circuit is … (a) broken (b) cut (c) open (d) closed
19. 19.Which of these uses electricity? (a) a bicycle dynamo (b) a power station (c) a wind turbine (d) a refrigerator
20. 20.True or false: to touch a fallen wire is not safe. (a) True (b) False
21. 21.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel coin across the gap. Does the bulb glow? (a) No (b) Yes
22. 22.True or false: a tilt switch closes near a magnet. (a) False (b) True
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) brighter (c) dimmer
24. 24.True or false: to throw cells in a fire is safe. (a) True (b) False
25. 25.Which of these gives us electricity? (a) a bicycle dynamo (b) a water pump (c) a washing machine (d) a refrigerator
26. 26.⚡ Which tiny particles drift along a metal wire to carry the current? (a) photons (b) water drops (c) dust particles (d) electrons
27. 27.Which of these is safe? (a) use a cable with cuts (b) build with an adult near (c) poke things in a socket (d) touch a fallen wire
28. 28.💡 6 identical bulbs are in parallel and each bulb has its own switch on its path. 2 of the switches are OFF and the rest are ON. How many bulbs glow?
29. 29.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
30. 30.True or false: a copper wire is an insulator. (a) True (b) False
31. 31.💡 A battery lights 5 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
32. 32.🔘 A bulb and a cell are joined through 3 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
33. 33.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) chemical energy (b) light energy (c) movement energy (d) sound energy
34. 34.🔋 3 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
35. 35.True or false: to throw cells in a fire is not safe. (a) True (b) False
36. 36.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) True (b) False
37. 37.🔌 Most metals are good … (a) magnets only (b) conductors (c) batteries (d) insulators
38. 38.🔋 What should you do with used-up cells? (a) throw them in a fire (b) give them for recycling (c) cut them open (d) bury them in soil
39. 39.True or false: a slide switch flips up or down. (a) False (b) True
40. 40.🔦 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

Free electronics lessons, practice and worksheets at talentjr.in/electronics-for-kids