Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 815 · 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) keep drinks far away (b) use small battery cells (c) use mains for a project (d) build with an adult near
2. 2.💡 Why is house wiring done in parallel? (a) to save copper only (b) to make bulbs dim (c) so all go off together (d) each gets full voltage
3. 3.Which of these uses electricity? (a) a wind turbine (b) a generator (c) a solar panel (d) an air conditioner
4. 4.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a long wire (b) a bulb (c) a fuse or MCB (d) a plug top
5. 5.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. A gap in one wire is bridged by a steel spoon. Does the bulb glow? (a) No (b) Yes
6. 6.True or false: to build with an adult near is not safe. (a) True (b) False
7. 7.🔍 Which is the odd one out? (a) a dry cork (b) a copper wire (c) a plastic ruler (d) a plastic straw
8. 8.🔌 Is a metal paper clip a conductor or an insulator? (a) a conductor (b) an insulator
9. 9.True or false: a toggle switch stays where you flip it. (a) True (b) False
10. 10.🔦 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) No (b) Yes
11. 11.🔋 Cells joined + to − in a row (series) give … (a) no voltage (b) a bigger voltage (c) a smaller voltage (d) the same voltage
12. 12.💡 In a series circuit, how many paths does the current have? (a) none (b) one for each bulb (c) one (d) two
13. 13.⚠️ Is it safe to keep drinks far away? (a) safe (b) not safe
14. 14.🔋 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)? =
15. 15.💡 4 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
16. 16.🔌 Is a paper strip a conductor or an insulator? (a) a conductor (b) an insulator
17. 17.🔌 Is a wooden stick a conductor or an insulator? (a) an insulator (b) a conductor
18. 18.💡 5 identical bulbs are joined in series with a 15 V battery (ideal wires). How many volts does each bulb get? =
19. 19.💡 3 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. Bulb 1 is taken out of its holder. Does bulb 2 glow? (a) No (b) Yes
20. 20.⚠️ Is it safe to fly kites in open fields? (a) safe (b) not safe
21. 21.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
22. 22.⚡ What do we call a flow of electric charge through a wire? (a) a magnet (b) friction (c) electric current (d) sound
23. 23.Which drawing is the symbol for a junction? (a) a line lifted at a gap (b) two or more cell symbols (c) a dot where wires meet (d) triangle against a bar
24. 24.🔍 Which is the odd one out? (a) a torch (b) an LED lamp (c) a night lamp (d) a ceiling fan
25. 25.🔋 How many 1.5 V cells must be joined in series to give 7.5 V?
26. 26.Which of these uses electricity? (a) a wind turbine (b) a water pump (c) a generator (d) a solar panel
27. 27.True or false: two or more cell symbols is the symbol for a diode. (a) False (b) True
28. 28.True or false: to poke things in a socket is safe. (a) False (b) True
29. 29.True or false: on a cell, “the flat end” means the − (negative) end. (a) True (b) False
30. 30.🔌 Is a copper wire a conductor or an insulator? (a) an insulator (b) a conductor
31. 31.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
32. 32.🔁 Is the circuit closed or open if a wire is cut? (a) open (b) closed
33. 33.🔌 Is a rubber eraser a conductor or an insulator? (a) a conductor (b) an insulator
34. 34.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
35. 35.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a copper wire across the gap. Does the bulb glow? (a) No (b) Yes
36. 36.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) series (b) parallel
37. 37.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) movement energy (b) sound energy (c) light energy (d) chemical energy
38. 38.🔍 Which is the odd one out? (a) a rubber band (b) a plastic straw (c) a steel spoon (d) a glass marble
39. 39.💡 5 identical bulbs are in parallel and each bulb has its own switch on its path. 4 of the switches are OFF and the rest are ON. How many bulbs glow?
40. 40.⚡ Which tiny particles drift along a metal wire to carry the current? (a) electrons (b) water drops (c) dust particles (d) photons

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