Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 632 · 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.✏️ In a cell symbol, which line is the + terminal? (a) the longer line (b) both lines (c) the shorter line (d) neither line
2. 2.💡 Why is house wiring done in parallel? (a) to save copper only (b) so all go off together (c) to make bulbs dim (d) each gets full voltage
3. 3.🔘 Which kind of switch stays where you flip it? (a) a toggle switch (b) a slide switch (c) a reed switch (d) a push button
4. 4.True or false: a push button stays where you flip it. (a) False (b) True
5. 5.🔗 Series or parallel circuit: “own switch for each bulb”? (a) series (b) parallel
6. 6.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) diode (b) switch (c) junction (d) cell
7. 7.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) closed (b) open
8. 8.Which of these gives us electricity? (a) a computer (b) a generator (c) an air conditioner (d) a refrigerator
9. 9.Which drawing is the symbol for a battery? (a) triangle against a bar (b) a circle with M inside (c) many long-short pairs (d) a circle with A inside
10. 10.Which of these is true of a series circuit? (a) used in house wiring (b) many paths for current (c) one out, the rest glow (d) a break stops every bulb
11. 11.⚠️ Is it safe to dry your hands first? (a) not safe (b) safe
12. 12.⚡ What does a traffic signal mainly change electricity into? (a) movement (b) heat (c) light (d) sound
13. 13.Which of these means the circuit is closed? (a) a wire has come loose (b) the switch is ON (c) a wire is cut (d) the switch is OFF
14. 14.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) True (b) False
15. 15.🔋 5 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
16. 16.Which of these is true of a series circuit? (a) used in house wiring (b) one out, the rest glow (c) bulbs share the voltage (d) own switch for each bulb
17. 17.Which of these mainly gives out light? (a) an electric iron (b) a doorbell (c) a torch (d) an electric kettle
18. 18.⚠️ Why must we never touch switches with wet hands? (a) it spoils the paint (b) it is just untidy (c) water makes it cold (d) water carries current
19. 19.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) light energy (b) movement energy (c) sound energy (d) chemical energy
20. 20.🔘 Which kind of switch flips up or down? (a) a push button (b) a reed switch (c) a toggle switch (d) a tilt switch
21. 21.💡 A battery lights 4 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
22. 22.What does a push button do? (a) flips up or down (b) closes when tipped over (c) slides side to side (d) works only while pressed
23. 23.Which drawing is the symbol for a resistor? (a) triangle, bar and arrows (b) a circle with V inside (c) a small empty box (d) one tall, one short bar
24. 24.🔋 How many volts does one ordinary torch cell give? (a) 0.5 V (b) 15 V (c) 230 V (d) 1.5 V
25. 25.Which of these is safe? (a) touch a fallen wire (b) open a phone charger (c) use small battery cells (d) use mains for a project
26. 26.True or false: a woollen thread is a conductor. (a) True (b) False
27. 27.🔌 A gap of dry air between two wires acts as … (a) a switch that is ON (b) an insulator (c) a conductor (d) a cell
28. 28.True or false: a wooden stick is a conductor. (a) True (b) False
29. 29.✏️ Why do engineers draw circuits with symbols? (a) to hide the circuit (b) quick and clear for all (c) to make it colourful (d) symbols are heavier
30. 30.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
31. 31.✏️ In a circuit diagram, which part is drawn as a straight line? (a) cell (b) wire (c) diode (d) switch
32. 32.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is OFF, B is ON, C is OFF and D is OFF. Does the bulb glow? (a) No (b) Yes
33. 33.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
34. 34.💡 5 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?
35. 35.⚡ A cell changes stored chemical energy into which kind of energy? (a) nuclear energy (b) wind energy (c) electrical energy (d) sound energy
36. 36.💡 5 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
37. 37.True or false: a tilt switch closes when tipped over. (a) False (b) True
38. 38.🔌 Which part of a screwdriver should an electrician hold? (a) the steel shaft (b) the metal tip (c) the bare end (d) the plastic handle
39. 39.🔁 What do we call a circuit with a break in it? (a) a closed circuit (b) a series circuit (c) an open circuit (d) a full circuit
40. 40.Which of these gives us electricity? (a) a water pump (b) a computer (c) a power station (d) a refrigerator

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