Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 957 · 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 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 woollen thread. Does the bulb glow? (a) Yes (b) No
2. 2.💡 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 1 and 4 are taken out of their holders. How many bulbs glow?
3. 3.🔁 What must there be for a current to flow? (a) a complete loop (b) a plastic gap (c) one loose end (d) a broken path
4. 4.Which of these is safe? (a) open a phone charger (b) use a cable with cuts (c) climb an electric pole (d) take cells out after use
5. 5.🔦 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 graphite rod. Does the bulb glow? (a) No (b) Yes
6. 6.Which of these is a conductor? (a) a cotton thread (b) a dry cork (c) aluminium foil (d) a woollen thread
7. 7.🔋 How many 3 V cells must be joined in series to give 9 V?
8. 8.🔍 Which is the odd one out? (a) dry your hands first (b) use small battery cells (c) use a cable with cuts (d) take cells out after use
9. 9.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they all go out (c) they keep glowing (d) they get dimmer
10. 10.Which of these is true of a series circuit? (a) each gets the full volts (b) one bulb out, all go out (c) own switch for each bulb (d) one out, the rest glow
11. 11.⚡ What does an electric toy car mainly change electricity into? (a) sound (b) heat (c) light (d) movement
12. 12.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) series (b) parallel
13. 13.💡 5 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
14. 14.True or false: a tilt switch flips up or down. (a) True (b) False
15. 15.Which of these is a conductor? (a) a rubber eraser (b) a plastic ruler (c) a steel coin (d) a ceramic cup
16. 16.True or false: to throw cells in a fire is not safe. (a) False (b) True
17. 17.Which of these is true of a series circuit? (a) many paths for current (b) one out, the rest glow (c) a single current path (d) each gets the full volts
18. 18.True or false: a metal paper clip is an insulator. (a) True (b) False
19. 19.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a plastic ruler across the gap. Does the bulb glow? (a) No (b) Yes
20. 20.🔌 Is a brass key a conductor or an insulator? (a) an insulator (b) a conductor
21. 21.🔋 5 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)? =
22. 22.🔍 Which is the odd one out? (a) a street light (b) an electric kettle (c) an LED lamp (d) a torch
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) dimmer (b) the same (c) brighter
24. 24.💡 A battery lights 3 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
25. 25.Which of these is an insulator? (a) a paper strip (b) a brass key (c) a steel spoon (d) a graphite rod
26. 26.🔘 A cell and a bulb are joined to 3 side-by-side paths with one switch on each path — A, B and C (parallel). A is ON, B is OFF and C is ON. Does the bulb glow? (a) No (b) Yes
27. 27.🔍 Which is the odd one out? (a) open a phone charger (b) fly kites in open fields (c) poke things in a socket (d) touch a switch when wet
28. 28.Which of these mainly makes sound? (a) a traffic signal (b) a mixer grinder (c) a doorbell (d) an electric toy car
29. 29.💡 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) dimmer (c) brighter
30. 30.Which of these is not safe? (a) touch a switch when wet (b) fly kites in open fields (c) build with an adult near (d) use small battery cells
31. 31.Which of these is not safe? (a) build with an adult near (b) use a cable with cuts (c) dry your hands first (d) use small battery cells
32. 32.⚠️ Is it safe to build with an adult near? (a) not safe (b) safe
33. 33.🔘 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 ON, B is ON and C is OFF. Does the bulb glow? (a) Yes (b) No
34. 34.True or false: a straight line is the symbol for a junction. (a) False (b) True
35. 35.🔋 Cells joined + to − in a row (series) give … (a) a bigger voltage (b) the same voltage (c) no voltage (d) a smaller voltage
36. 36.💡 5 identical bulbs are joined in series with a 20 V battery (ideal wires). How many volts does each bulb get? =
37. 37.Which of these mainly gives out light? (a) a mixer grinder (b) a traffic signal (c) an electric toy car (d) an electric drill
38. 38.🔋 Does a bicycle dynamo give electricity or use electricity? (a) uses electricity (b) gives electricity
39. 39.🔘 Which kind of switch closes when tipped over? (a) a push button (b) a toggle switch (c) a tilt switch (d) a slide switch
40. 40.🔍 Which is the odd one out? (a) touch a fallen wire (b) poke things in a socket (c) dry your hands first (d) use mains for a project

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