Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 739 · 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.🔋 5 identical 3 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
2. 2.🔍 Which is the odd one out? (a) touch a fallen wire (b) climb an electric pole (c) touch a switch when wet (d) fly kites in open fields
3. 3.Which of these is a conductor? (a) a cotton thread (b) a steel spoon (c) a glass marble (d) a paper strip
4. 4.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
5. 5.🔋 Cells joined + to − in a row (series) give … (a) a smaller voltage (b) no voltage (c) the same voltage (d) a bigger voltage
6. 6.Which of these means the circuit is open? (a) all wires are joined (b) the switch is ON (c) the loop is complete (d) a cell is taken out
7. 7.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) True (b) False
8. 8.🔋 A 3 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
9. 9.True or false: a water heater mainly gives out heat. (a) False (b) True
10. 10.True or false: a dot where wires meet is the symbol for an ammeter. (a) True (b) False
11. 11.True or false: to use a cable with cuts is safe. (a) True (b) False
12. 12.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
13. 13.Which of these is an insulator? (a) a plastic straw (b) a steel coin (c) a steel spoon (d) aluminium foil
14. 14.Which of these is true of a parallel circuit? (a) a single current path (b) own switch for each bulb (c) a break stops every bulb (d) one bulb out, all go out
15. 15.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
16. 16.Which of these is an insulator? (a) a graphite rod (b) a cotton thread (c) a safety pin (d) a brass key
17. 17.Which of these is an insulator? (a) a steel spoon (b) a metal paper clip (c) a wooden stick (d) a graphite rod
18. 18.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a cotton thread across the gap. Does the bulb glow? (a) Yes (b) No
19. 19.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) False (b) True
20. 20.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
21. 21.🔍 Which is the odd one out? (a) a siren (b) a doorbell (c) an exhaust fan (d) a school bell
22. 22.✏️ In a circuit diagram, which part is drawn as two equal parallel lines? (a) capacitor (b) diode (c) battery (d) LED
23. 23.⚡ What does a traffic signal mainly change electricity into? (a) heat (b) light (c) movement (d) sound
24. 24.🔁 Is the circuit closed or open if a wire is cut? (a) closed (b) open
25. 25.✏️ In a circuit diagram, which part is drawn as a dot where wires meet? (a) diode (b) resistor (c) junction (d) battery
26. 26.🔌 Why are electric wires covered in plastic? (a) to make them heavy (b) plastic is a conductor (c) plastic is an insulator (d) plastic makes current
27. 27.🔋 Does a generator give electricity or use electricity? (a) gives electricity (b) uses electricity
28. 28.Which of these is a conductor? (a) a cotton thread (b) a copper wire (c) a ceramic cup (d) a paper strip
29. 29.Which of these uses electricity? (a) a bicycle dynamo (b) a wind turbine (c) a cell (d) a computer
30. 30.🔘 A bulb and a cell are joined through 5 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.Which of these is not safe? (a) stay away from pylons (b) dry your hands first (c) use a cable with cuts (d) stop if a part gets hot
32. 32.🔋 Does a computer give electricity or use electricity? (a) uses electricity (b) gives electricity
33. 33.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
34. 34.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
35. 35.⚠️ Which power source should children use for electronics projects? (a) a mains extension board (b) an inverter socket (c) a wall socket (d) a small battery pack
36. 36.Which of these mainly makes movement? (a) a siren (b) a torch (c) a night lamp (d) a table fan
37. 37.🔋 How many 3 V cells must be joined in series to give 6 V?
38. 38.True or false: to stop if a part gets hot is not safe. (a) False (b) True
39. 39.🔘 Which kind of switch stays where you flip it? (a) a toggle switch (b) a push button (c) a slide switch (d) a reed switch
40. 40.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)

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