Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 813 · 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 of these is true of a series circuit? (a) one out, the rest glow (b) a single current path (c) many paths for current (d) each gets the full volts
2. 2.True or false: triangle against a bar is the symbol for a capacitor. (a) False (b) True
3. 3.💡 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 1 is taken out of its holder. How many bulbs glow?
4. 4.🔦 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) Yes (b) No
5. 5.💡 3 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
6. 6.✏️ In a circuit diagram, wires are usually drawn as … (a) dotted circles (b) wavy lines (c) straight lines (d) little stars
7. 7.What does a push button do? (a) flips up or down (b) springs back when let go (c) stays where you flip it (d) closes near a magnet
8. 8.💡 3 identical bulbs are joined in series with a 12 V battery (ideal wires). How many volts does each bulb get? =
9. 9.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
10. 10.🔁 Is the circuit closed or open if the loop is complete? (a) open (b) closed
11. 11.True or false: if the bulb is unscrewed, the circuit is closed and current flows. (a) True (b) False
12. 12.🔋 How many volts does one ordinary torch cell give? (a) 0.5 V (b) 1.5 V (c) 230 V (d) 15 V
13. 13.Which of these means the circuit is closed? (a) the switch is ON (b) the bulb is unscrewed (c) a wire is cut (d) the switch is OFF
14. 14.Which of these is an insulator? (a) an iron nail (b) a plastic straw (c) a metal paper clip (d) a steel coin
15. 15.True or false: to touch a switch when wet is not safe. (a) False (b) True
16. 16.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) used in house wiring (c) a break stops every bulb (d) a single current path
17. 17.🔋 Does a refrigerator give electricity or use electricity? (a) gives electricity (b) uses electricity
18. 18.🔌 Why are electric wires covered in plastic? (a) plastic is a conductor (b) plastic makes current (c) to make them heavy (d) plastic is an insulator
19. 19.Which of these means the circuit is open? (a) the loop is complete (b) the switch is ON (c) all wires are joined (d) a wire is cut
20. 20.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
21. 21.🔘 Which kind of switch springs back when let go? (a) a reed switch (b) a tilt switch (c) a push button (d) a toggle switch
22. 22.Which of these mainly makes sound? (a) a traffic signal (b) a rice cooker (c) a siren (d) a night lamp
23. 23.💡 2 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
24. 24.💡 2 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. How many bulbs glow?
25. 25.💡 6 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
26. 26.🔗 Series or parallel circuit: “own switch for each bulb”? (a) series (b) parallel
27. 27.⚡ What does a loudspeaker mainly change electricity into? (a) light (b) movement (c) sound (d) heat
28. 28.What does a reed switch do? (a) slides side to side (b) closes near a magnet (c) works only while pressed (d) flips up or down
29. 29.🔌 Is an iron nail a conductor or an insulator? (a) an insulator (b) a conductor
30. 30.🔁 Is the circuit closed or open if a cell is taken out? (a) open (b) closed
31. 31.✏️ In a circuit diagram, which part is drawn as a circle with an X in it? (a) junction (b) bulb (c) motor (d) voltmeter
32. 32.💡 6 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
33. 33.True or false: to dry your hands first is safe. (a) False (b) True
34. 34.Which of these is not safe? (a) fly kites in open fields (b) touch a switch when wet (c) use small battery cells (d) take cells out after use
35. 35.Which drawing is the symbol for a resistor? (a) two or more cell symbols (b) triangle, bar and arrows (c) a plain rectangle (d) a long and a short line
36. 36.🔍 Which is the odd one out? (a) a street light (b) a traffic signal (c) a toaster (d) a tube light
37. 37.🔌 Which part of a screwdriver should an electrician hold? (a) the metal tip (b) the plastic handle (c) the steel shaft (d) the bare end
38. 38.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) cell (b) junction (c) switch (d) voltmeter
39. 39.Which of these is an insulator? (a) a brass key (b) a graphite rod (c) a steel spoon (d) a dry cork
40. 40.💡 A battery lights 2 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

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