Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 771 · 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 ON. One wire has come loose from the cell. Does the bulb glow? (a) Yes (b) No
2. 2.Which of these is an insulator? (a) a copper wire (b) a graphite rod (c) a glass marble (d) a steel spoon
3. 3.Which of these is true of a series circuit? (a) one out, the rest glow (b) a single current path (c) each gets the full volts (d) used in house wiring
4. 4.Which of these is safe? (a) touch a fallen wire (b) throw cells in a fire (c) keep drinks far away (d) touch a switch when wet
5. 5.💡 4 identical bulbs are in parallel and each bulb has its own switch on its path. 3 of the switches are OFF and the rest are ON. How many bulbs glow?
6. 6.True or false: if a wire is cut, the circuit is closed and current flows. (a) False (b) True
7. 7.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
8. 8.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) False (b) True
9. 9.Which drawing is the symbol for a capacitor? (a) a circle with V inside (b) many long-short pairs (c) a circle with a cross (d) two equal parallel lines
10. 10.🔦 A circuit has a used-up (dead) 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 spoon. Does the bulb glow? (a) No (b) Yes
11. 11.Which drawing is the symbol for a cell? (a) a circle with a cross (b) a dot where wires meet (c) one tall, one short bar (d) a straight line
12. 12.Which of these gives us electricity? (a) a refrigerator (b) a washing machine (c) a generator (d) a water pump
13. 13.True or false: “one out, the rest glow” is true of a series circuit. (a) False (b) True
14. 14.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
15. 15.🔗 Series or parallel circuit: “a single current path”? (a) series (b) parallel
16. 16.True or false: a circle with A inside is the symbol for an LED. (a) False (b) True
17. 17.True or false: a table fan mainly gives out heat. (a) True (b) False
18. 18.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) diode (b) ammeter (c) junction (d) cell
19. 19.True or false: “used in house wiring” is true of a series circuit. (a) False (b) True
20. 20.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
21. 21.Which drawing is the symbol for a battery? (a) a circle with an X in it (b) one tall, one short bar (c) a line lifted at a gap (d) many long-short pairs
22. 22.🔍 Which is the odd one out? (a) keep drinks far away (b) use small battery cells (c) stop if a part gets hot (d) climb an electric pole
23. 23.⚡ What do we call a flow of electric charge through a wire? (a) friction (b) sound (c) electric current (d) a magnet
24. 24.🔍 Which is the odd one out? (a) a brass key (b) a steel spoon (c) a woollen thread (d) an iron nail
25. 25.🔋 Does a refrigerator give electricity or use electricity? (a) gives electricity (b) uses electricity
26. 26.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. How many bulbs glow?
27. 27.True or false: a ceramic cup is an insulator. (a) True (b) False
28. 28.⚠️ Why must we never touch switches with wet hands? (a) water makes it cold (b) it spoils the paint (c) it is just untidy (d) water carries current
29. 29.⚡ What does a traffic signal mainly change electricity into? (a) movement (b) sound (c) heat (d) light
30. 30.🔌 Is a rubber band a conductor or an insulator? (a) a conductor (b) an insulator
31. 31.True or false: on a cell, “the flat end” means the − (negative) end. (a) True (b) False
32. 32.✏️ In a circuit diagram, which part is drawn as a circle with V inside? (a) switch (b) motor (c) voltmeter (d) battery
33. 33.What does a slide switch do? (a) works only while pressed (b) springs back when let go (c) closes when tipped over (d) slides side to side
34. 34.🔍 Which is the odd one out? (a) take cells out after use (b) dry your hands first (c) touch a fallen wire (d) fly kites in open fields
35. 35.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) chemical energy (b) movement energy (c) light energy (d) sound energy
36. 36.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
37. 37.Which of these gives us electricity? (a) a power station (b) a washing machine (c) a computer (d) a mobile phone
38. 38.True or false: if a cell is taken out, the circuit is open and no current flows. (a) False (b) True
39. 39.True or false: if all wires are joined, the circuit is closed and current flows. (a) False (b) True
40. 40.🔁 Is the circuit closed or open if the loop is complete? (a) closed (b) open

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