Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 392 · 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.⚠️ Is it safe to use small battery cells? (a) not safe (b) safe
2. 2.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they keep glowing (c) they all go out (d) they explode
3. 3.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) series (b) parallel
4. 4.What does a reed switch do? (a) slides side to side (b) springs back when let go (c) flips up or down (d) closes near a magnet
5. 5.🔘 Which kind of switch slides side to side? (a) a push button (b) a slide switch (c) a toggle switch (d) a reed switch
6. 6.🔦 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) No (b) Yes
7. 7.Which of these mainly gives out heat? (a) a doorbell (b) a night lamp (c) an electric kettle (d) a loudspeaker
8. 8.🔘 Which kind of switch closes when tipped over? (a) a toggle switch (b) a reed switch (c) a tilt switch (d) a push button
9. 9.Which of these is safe? (a) use a cable with cuts (b) stop if a part gets hot (c) climb an electric pole (d) poke things in a socket
10. 10.What does a push button do? (a) springs back when let go (b) flips up or down (c) closes near a magnet (d) slides side to side
11. 11.🔘 Which kind of switch closes near a magnet? (a) a reed switch (b) a push button (c) a slide switch (d) a toggle switch
12. 12.🔘 A cell and a bulb are joined to two side-by-side paths: path 1 has switches A and B one after another, path 2 has switch C. A is ON, B is ON and C is OFF. Does the bulb glow? (a) No (b) Yes
13. 13.🔘 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 OFF, B is ON and C is ON. Does the bulb glow? (a) Yes (b) No
14. 14.💡 In a series circuit, how many paths does the current have? (a) one (b) two (c) one for each bulb (d) none
15. 15.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
16. 16.Which of these is a conductor? (a) a rubber band (b) a plastic ruler (c) a steel spoon (d) a ceramic cup
17. 17.⚡ What does a traffic signal mainly change electricity into? (a) movement (b) sound (c) heat (d) light
18. 18.⚠️ Is it safe to dry your hands first? (a) not safe (b) safe
19. 19.True or false: a tube light mainly gives out light. (a) False (b) True
20. 20.💡 A battery lights 5 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
21. 21.True or false: a slide switch closes near a magnet. (a) False (b) True
22. 22.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
23. 23.Which of these mainly makes movement? (a) a rice cooker (b) a water heater (c) a school bell (d) an electric drill
24. 24.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. A gap in one wire is bridged by a graphite rod. Does the bulb glow? (a) Yes (b) No
25. 25.Which drawing is the symbol for a switch? (a) many long-short pairs (b) a dot where wires meet (c) a line lifted at a gap (d) a plain rectangle
26. 26.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 3 is taken out of its holder. Does bulb 1 glow? (a) No (b) Yes
27. 27.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) resistor (b) motor (c) voltmeter (d) capacitor
28. 28.🔌 Is a steel spoon a conductor or an insulator? (a) a conductor (b) an insulator
29. 29.True or false: an LED lamp mainly gives out heat. (a) False (b) True
30. 30.Which of these mainly makes sound? (a) a siren (b) a tube light (c) a mixer grinder (d) an electric kettle
31. 31.Which of these means the circuit is open? (a) all wires are joined (b) a wire is cut (c) the loop is complete (d) the switch is ON
32. 32.🔋 4 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
33. 33.Which drawing is the symbol for an LED? (a) triangle, bar and arrows (b) a circle with an X in it (c) one tall, one short bar (d) a dot where wires meet
34. 34.⚡ What does an electric kettle mainly change electricity into? (a) movement (b) light (c) heat (d) sound
35. 35.🔋 How many 1.2 V cells must be joined in series to give 8.4 V?
36. 36.🔘 A bulb and a cell are joined through 5 switches on 5 side-by-side paths, one switch on each path (parallel). What is the smallest number of switches that must be ON to light the bulb?
37. 37.Which drawing is the symbol for a motor? (a) many long-short pairs (b) a circle with an X in it (c) a circle with M inside (d) a dot where wires meet
38. 38.💡 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
39. 39.⚠️ Is it safe to open a phone charger? (a) safe (b) not safe
40. 40.True or false: a siren mainly gives out heat. (a) False (b) True

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