Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 533 · 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: “one out, the rest glow” is true of a parallel circuit. (a) True (b) False
2. 2.🔘 A cell and a bulb are joined to two side-by-side paths: path 1 has switches A and B one after another, path 2 has switch C. A is OFF, B is OFF and C is ON. Does the bulb glow? (a) Yes (b) No
3. 3.💡 4 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
4. 4.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) False (b) True
5. 5.🔍 Which is the odd one out? (a) a wooden stick (b) a rubber band (c) a plastic ruler (d) aluminium foil
6. 6.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 when tipped over
7. 7.⚠️ Is it safe to dry your hands first? (a) not safe (b) safe
8. 8.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a rubber band across the gap. Does the bulb glow? (a) No (b) Yes
9. 9.💡 5 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
10. 10.🔍 Which is the odd one out? (a) a street light (b) a mixer grinder (c) a tube light (d) a torch
11. 11.🔋 5 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
12. 12.🔘 Which kind of switch closes near a magnet? (a) a slide switch (b) a reed switch (c) a push button (d) a tilt switch
13. 13.💡 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
14. 14.🔋 Does a refrigerator give electricity or use electricity? (a) uses electricity (b) gives electricity
15. 15.🔌 Is aluminium foil a conductor or an insulator? (a) a conductor (b) an insulator
16. 16.Which of these is a conductor? (a) a steel coin (b) a plastic ruler (c) a glass marble (d) a woollen thread
17. 17.Which drawing is the symbol for an ammeter? (a) a circle with A inside (b) a circle with a cross (c) a circle with V inside (d) one tall, one short bar
18. 18.What does a slide switch do? (a) slides side to side (b) works only while pressed (c) closes near a magnet (d) springs back when let go
19. 19.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
20. 20.⚡ A solar panel changes which kind of energy into electricity? (a) light energy (b) chemical energy (c) sound energy (d) wind energy
21. 21.What does a reed switch do? (a) closes near a magnet (b) closes when tipped over (c) slides side to side (d) flips up or down
22. 22.True or false: to climb an electric pole is safe. (a) True (b) False
23. 23.Which of these is true of a series circuit? (a) each gets the full volts (b) one out, the rest glow (c) one bulb out, all go out (d) own switch for each bulb
24. 24.🔁 Is the circuit closed or open if a wire has come loose? (a) open (b) closed
25. 25.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they get dimmer (c) they keep glowing (d) they explode
26. 26.True or false: a night lamp mainly gives out heat. (a) True (b) False
27. 27.True or false: if the loop is complete, the circuit is open and no current flows. (a) True (b) False
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 aluminium foil. Does the bulb glow? (a) Yes (b) No
29. 29.Which of these is not safe? (a) climb an electric pole (b) keep drinks far away (c) stay away from pylons (d) dry your hands first
30. 30.🔘 Two switches are in series. When does the bulb glow? (a) never (b) when either is ON (c) when both are OFF (d) when both are ON
31. 31.Which drawing is the symbol for a voltmeter? (a) a circle with V inside (b) a circle with A inside (c) a straight line (d) triangle against a bar
32. 32.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) one (c) two (d) none
33. 33.✏️ Why do engineers draw circuits with symbols? (a) quick and clear for all (b) to make it colourful (c) symbols are heavier (d) to hide the circuit
34. 34.True or false: a steel spoon is an insulator. (a) True (b) False
35. 35.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
36. 36.🔋 8 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
37. 37.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) True (b) False
38. 38.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is OFF and B is OFF. Does the bulb glow? (a) No (b) Yes
39. 39.🔋 How many 1.2 V cells must be joined in series to give 7.2 V?
40. 40.Which of these is an insulator? (a) a metal paper clip (b) aluminium foil (c) a steel coin (d) a plastic ruler

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