Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 91 · 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) a loudspeaker (b) a buzzer (c) a water heater (d) a siren
2. 2.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
3. 3.✏️ Why do engineers draw circuits with symbols? (a) to hide the circuit (b) symbols are heavier (c) to make it colourful (d) quick and clear for all
4. 4.🔋 4 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
5. 5.🔦 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
6. 6.🔦 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 a steel spoon. Does the bulb glow? (a) No (b) Yes
7. 7.Which of these mainly makes movement? (a) a ceiling fan (b) a traffic signal (c) a room heater (d) a loudspeaker
8. 8.Which of these means the circuit is open? (a) the switch is ON (b) all wires are joined (c) the loop is complete (d) the switch is OFF
9. 9.🔦 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 a safety pin. Does the bulb glow? (a) No (b) Yes
10. 10.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) cell (b) wire (c) bulb (d) switch
11. 11.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
12. 12.True or false: a torch mainly makes sound. (a) False (b) True
13. 13.🔍 Which is the odd one out? (a) a glass marble (b) a copper wire (c) a plastic straw (d) a rubber eraser
14. 14.🔍 Which is the odd one out? (a) a metal paper clip (b) a woollen thread (c) a steel spoon (d) aluminium foil
15. 15.⚠️ Is it safe to use a cable with cuts? (a) not safe (b) safe
16. 16.True or false: a circle with M inside is the symbol for a switch. (a) True (b) False
17. 17.💡 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?
18. 18.✏️ In a circuit diagram, wires are usually drawn as … (a) wavy lines (b) dotted circles (c) straight lines (d) little stars
19. 19.True or false: a toggle switch springs back when let go. (a) False (b) True
20. 20.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are OFF (b) when either is ON (c) only when both are ON (d) never
21. 21.⚡ What does a ceiling fan mainly change electricity into? (a) movement (b) light (c) sound (d) heat
22. 22.Which of these means the circuit is open? (a) a cell is taken out (b) all wires are joined (c) the switch is ON (d) the loop is complete
23. 23.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 3 is taken out of its holder. Does bulb 1 glow? (a) No (b) Yes
24. 24.True or false: a circle with an X in it is the symbol for a bulb. (a) True (b) False
25. 25.🔋 Does a water pump give electricity or use electricity? (a) gives electricity (b) uses electricity
26. 26.True or false: if a wire has come loose, the circuit is closed and current flows. (a) False (b) True
27. 27.🔋 Does a wind turbine give electricity or use electricity? (a) gives electricity (b) uses electricity
28. 28.Which drawing is the symbol for a capacitor? (a) two equal parallel lines (b) many long-short pairs (c) a long and a short line (d) a small empty box
29. 29.True or false: if a wire is cut, the circuit is open and no current flows. (a) True (b) False
30. 30.🔋 How many volts does one ordinary torch cell give? (a) 0.5 V (b) 15 V (c) 1.5 V (d) 230 V
31. 31.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
32. 32.🔦 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
33. 33.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
34. 34.💡 Why is house wiring done in parallel? (a) so all go off together (b) to save copper only (c) to make bulbs dim (d) each gets full voltage
35. 35.🔦 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) No (b) Yes
36. 36.🔋 How many 1.2 V cells must be joined in series to give 7.2 V?
37. 37.🔌 Why are electric wires covered in plastic? (a) plastic is an insulator (b) to make them heavy (c) plastic makes current (d) plastic is a conductor
38. 38.Which of these gives us electricity? (a) a mobile phone (b) an air conditioner (c) a computer (d) a bicycle dynamo
39. 39.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
40. 40.🔍 Which is the odd one out? (a) stop if a part gets hot (b) fly a kite near wires (c) fly kites in open fields (d) build with an adult near

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