Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 741 · 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: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
2. 2.Which of these is not safe? (a) stop if a part gets hot (b) use small battery cells (c) take cells out after use (d) climb an electric pole
3. 3.🔌 Is a metal paper clip a conductor or an insulator? (a) an insulator (b) a conductor
4. 4.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
5. 5.🔌 Is a steel coin a conductor or an insulator? (a) an insulator (b) a conductor
6. 6.True or false: if the switch is OFF, the circuit is open and no current flows. (a) False (b) True
7. 7.💡 In a series circuit, how many paths does the current have? (a) none (b) one for each bulb (c) one (d) two
8. 8.Which of these is a conductor? (a) a paper strip (b) a plastic ruler (c) a rubber band (d) aluminium foil
9. 9.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
10. 10.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
11. 11.Which of these is not safe? (a) fly kites in open fields (b) build with an adult near (c) fly a kite near wires (d) stay away from pylons
12. 12.True or false: a circle with A inside is the symbol for an ammeter. (a) True (b) False
13. 13.🔦 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 glass marble. Does the bulb glow? (a) No (b) Yes
14. 14.🔋 Identical cells side by side (in parallel) give … (a) half the voltage (b) double the voltage (c) the same voltage (d) no voltage
15. 15.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) bulb (b) diode (c) junction (d) LED
16. 16.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is ON and B is OFF. Does the bulb glow? (a) No (b) Yes
17. 17.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) light energy (b) movement energy (c) sound energy (d) chemical energy
18. 18.💡 A battery lights 2 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
19. 19.🔦 A circuit has a used-up (dead) cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
20. 20.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
21. 21.⚠️ Is it safe to use a cable with cuts? (a) not safe (b) safe
22. 22.🔋 A 9 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
23. 23.🔍 Which is the odd one out? (a) an electric toy car (b) a room heater (c) an electric drill (d) a ceiling fan
24. 24.💡 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?
25. 25.💡 A battery lights 2 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
26. 26.True or false: if the bulb is unscrewed, the circuit is closed and current flows. (a) False (b) True
27. 27.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) shout for an adult (b) wait and watch (c) pull them by the hand (d) pour water on them
28. 28.Which of these means the circuit is open? (a) the switch is ON (b) a wire has come loose (c) the loop is complete (d) all wires are joined
29. 29.🔦 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 an iron nail. Does the bulb glow? (a) No (b) Yes
30. 30.🔘 A bulb and a cell are joined through 3 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
31. 31.🔌 Why are electric wires covered in plastic? (a) plastic is an insulator (b) to make them heavy (c) plastic is a conductor (d) plastic makes current
32. 32.True or false: if the loop is complete, the circuit is open and no current flows. (a) True (b) False
33. 33.Which of these uses electricity? (a) a computer (b) a battery (c) a bicycle dynamo (d) a solar panel
34. 34.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) False (b) True
35. 35.🔘 Which kind of switch closes near a magnet? (a) a tilt switch (b) a slide switch (c) a reed switch (d) a push button
36. 36.What does a push button do? (a) stays where you flip it (b) flips up or down (c) closes near a magnet (d) springs back when let go
37. 37.What does a reed switch do? (a) flips up or down (b) closes near a magnet (c) works only while pressed (d) slides side to side
38. 38.Which of these means the circuit is closed? (a) the switch is ON (b) a wire has come loose (c) a wire is cut (d) the switch is OFF
39. 39.True or false: a metal paper clip is an insulator. (a) True (b) False
40. 40.🔌 Is a copper wire a conductor or an insulator? (a) a conductor (b) an insulator

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