Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 49 · 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 a ceramic cup a conductor or an insulator? (a) an insulator (b) a conductor
2. 2.True or false: a ceramic cup is a conductor. (a) False (b) True
3. 3.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) bulb (b) resistor (c) capacitor (d) battery
4. 4.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
5. 5.True or false: a reed switch springs back when let go. (a) False (b) True
6. 6.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) True (b) False
7. 7.🔍 Which is the odd one out? (a) a rubber eraser (b) a graphite rod (c) a metal paper clip (d) an iron nail
8. 8.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) True (b) False
9. 9.What does a reed switch do? (a) works only while pressed (b) closes when tipped over (c) closes near a magnet (d) stays where you flip it
10. 10.True or false: a circle with V inside is the symbol for a voltmeter. (a) False (b) True
11. 11.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
12. 12.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
13. 13.🔍 Which is the odd one out? (a) touch a switch when wet (b) dry your hands first (c) open a phone charger (d) fly a kite near wires
14. 14.💡 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?
15. 15.True or false: a loudspeaker mainly gives out light. (a) True (b) False
16. 16.⚠️ Is it safe to fly kites in open fields? (a) safe (b) not safe
17. 17.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
18. 18.🔍 Which is the odd one out? (a) fly a kite near wires (b) open a phone charger (c) use mains for a project (d) build with an adult near
19. 19.💡 3 identical bulbs are joined in series with a 4.5 V battery (ideal wires). How many volts does each bulb get? =
20. 20.True or false: many long-short pairs is the symbol for a battery. (a) False (b) True
21. 21.Which of these mainly gives out light? (a) an electric drill (b) an electric iron (c) a water heater (d) a street light
22. 22.💡 In a series circuit, how many paths does the current have? (a) one (b) none (c) two (d) one for each bulb
23. 23.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
24. 24.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
25. 25.🔍 Which is the odd one out? (a) fly kites in open fields (b) use small battery cells (c) touch a switch when wet (d) stay away from pylons
26. 26.⚠️ Is it safe to throw cells in a fire? (a) not safe (b) safe
27. 27.🔌 Is a paper strip a conductor or an insulator? (a) an insulator (b) a conductor
28. 28.🔦 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 brass key. Does the bulb glow? (a) Yes (b) No
29. 29.⚠️ Is it safe to build with an adult near? (a) safe (b) not safe
30. 30.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 5 is taken out of its holder. How many bulbs glow?
31. 31.💡 2 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 2 is taken out of its holder. How many bulbs glow?
32. 32.💡 4 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
33. 33.💡 2 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
34. 34.💡 A battery lights 4 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
35. 35.🔁 What do we call a circuit with a break in it? (a) a closed circuit (b) an open circuit (c) a series circuit (d) a full circuit
36. 36.⚠️ Is it safe to dry your hands first? (a) safe (b) not safe
37. 37.🔘 Which kind of switch springs back when let go? (a) a toggle switch (b) a push button (c) a reed switch (d) a tilt switch
38. 38.💡 4 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 2 are taken out of their holders. How many bulbs glow?
39. 39.💡 2 identical bulbs are joined in series with a 4 V battery (ideal wires). How many volts does each bulb get? =
40. 40.💡 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

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