Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 824 · 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 brass key (b) a steel coin (c) a steel spoon (d) a plastic ruler
2. 2.🔌 Is a ceramic cup a conductor or an insulator? (a) an insulator (b) a conductor
3. 3.⚡ What does a rice cooker mainly change electricity into? (a) light (b) sound (c) movement (d) heat
4. 4.🔌 Is a plastic ruler a conductor or an insulator? (a) an insulator (b) a conductor
5. 5.True or false: if the bulb is unscrewed, the circuit is open and no current flows. (a) True (b) False
6. 6.🔋 7 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
7. 7.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
8. 8.💡 6 identical bulbs are in parallel and each bulb has its own switch on its path. 5 of the switches are OFF and the rest are ON. How many bulbs glow?
9. 9.✏️ In a circuit diagram, which part is drawn as a circle with an X in it? (a) resistor (b) wire (c) battery (d) bulb
10. 10.Which of these mainly gives out light? (a) a night lamp (b) a table fan (c) a loudspeaker (d) a toaster
11. 11.💡 A battery lights 3 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
12. 12.Which of these mainly gives out light? (a) a loudspeaker (b) an LED lamp (c) a school bell (d) an electric drill
13. 13.💡 5 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
14. 14.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) parallel (b) series
15. 15.True or false: a small empty box is the symbol for an LED. (a) False (b) True
16. 16.True or false: a mixer grinder mainly gives out heat. (a) True (b) False
17. 17.True or false: a straight line is the symbol for a capacitor. (a) True (b) False
18. 18.🔌 Is a woollen thread a conductor or an insulator? (a) an insulator (b) a conductor
19. 19.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a break stops every bulb (c) one out, the rest glow (d) a single current path
20. 20.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) many paths for current (c) one bulb out, all go out (d) a single current path
21. 21.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) True (b) False
22. 22.🔋 6 identical 1.5 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
23. 23.⚠️ Is it safe to dry your hands first? (a) not safe (b) safe
24. 24.Which of these means the circuit is open? (a) the switch is ON (b) the loop is complete (c) a wire is cut (d) all wires are joined
25. 25.💡 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
26. 26.✏️ In a cell symbol, which line is the + terminal? (a) the longer line (b) neither line (c) the shorter line (d) both lines
27. 27.⚡ What do we call a flow of electric charge through a wire? (a) electric current (b) sound (c) friction (d) a magnet
28. 28.🔁 What do we call a circuit with a break in it? (a) a series circuit (b) a full circuit (c) an open circuit (d) a closed circuit
29. 29.🔘 Which kind of switch stays where you flip it? (a) a slide switch (b) a toggle switch (c) a reed switch (d) a push button
30. 30.✏️ In a circuit diagram, which part is drawn as a straight line? (a) cell (b) wire (c) battery (d) switch
31. 31.Which of these uses electricity? (a) a generator (b) a cell (c) a television (d) a wind turbine
32. 32.🔍 Which is the odd one out? (a) a mixer grinder (b) an exhaust fan (c) an LED lamp (d) an electric toy car
33. 33.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) in parallel (c) in series (d) by Wi-Fi
34. 34.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
35. 35.⚡ Which tiny particles drift along a metal wire to carry the current? (a) water drops (b) electrons (c) photons (d) dust particles
36. 36.What does a toggle switch do? (a) works only while pressed (b) flips up or down (c) slides side to side (d) closes when tipped over
37. 37.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
38. 38.🔘 Which kind of switch flips up or down? (a) a push button (b) a tilt switch (c) a toggle switch (d) a reed switch
39. 39.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is ON, B is ON and C is OFF. Does the bulb glow? (a) No (b) Yes
40. 40.🔍 Which is the odd one out? (a) a glass marble (b) a plastic straw (c) a rubber eraser (d) an iron nail

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