Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 834 · 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.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
2. 2.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
3. 3.🔘 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 OFF, B is ON and C is ON. Does the bulb glow? (a) Yes (b) No
4. 4.✏️ In a circuit diagram, which part is drawn as a plain rectangle? (a) switch (b) wire (c) cell (d) resistor
5. 5.⚡ What does a school bell mainly change electricity into? (a) sound (b) heat (c) light (d) movement
6. 6.🔘 Which kind of switch springs back when let go? (a) a toggle switch (b) a tilt switch (c) a push button (d) a reed switch
7. 7.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) closed (b) open
8. 8.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) False (b) True
9. 9.Which of these means the circuit is open? (a) the switch is ON (b) all wires are joined (c) the loop is complete (d) the bulb is unscrewed
10. 10.✏️ In a circuit diagram, which part is drawn as a straight line? (a) junction (b) wire (c) motor (d) ammeter
11. 11.What does a push button do? (a) flips up or down (b) stays where you flip it (c) springs back when let go (d) closes when tipped over
12. 12.✏️ In a circuit diagram, wires are usually drawn as … (a) dotted circles (b) wavy lines (c) straight lines (d) little stars
13. 13.True or false: a slide switch springs back when let go. (a) False (b) True
14. 14.Which of these is an insulator? (a) a rubber band (b) an iron nail (c) a steel spoon (d) a graphite rod
15. 15.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
16. 16.True or false: two equal parallel lines is the symbol for a capacitor. (a) False (b) True
17. 17.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) neither line (c) the longer line (d) both lines
18. 18.Which of these means the circuit is closed? (a) the bulb is unscrewed (b) a wire has come loose (c) a cell is taken out (d) all wires are joined
19. 19.🔌 Is a steel spoon a conductor or an insulator? (a) a conductor (b) an insulator
20. 20.True or false: a loudspeaker mainly gives out light. (a) True (b) False
21. 21.🔘 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) No (b) Yes
22. 22.⚠️ Is it safe to poke things in a socket? (a) safe (b) not safe
23. 23.🔘 A bulb and a cell are joined through 2 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
24. 24.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
25. 25.🔘 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
26. 26.⚡ What does a ceiling fan mainly change electricity into? (a) movement (b) heat (c) sound (d) light
27. 27.⚡ What do we call a flow of electric charge through a wire? (a) electric current (b) a magnet (c) sound (d) friction
28. 28.True or false: a buzzer mainly gives out heat. (a) False (b) True
29. 29.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) junction (b) battery (c) cell (d) switch
30. 30.🔋 7 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
31. 31.🔌 Is an iron nail a conductor or an insulator? (a) an insulator (b) a conductor
32. 32.💡 Why is house wiring done in parallel? (a) so all go off together (b) to save copper only (c) to make bulbs dim (d) each gets full voltage
33. 33.🔁 Is the circuit closed or open if all wires are joined? (a) open (b) closed
34. 34.💡 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) dimmer (c) the same
35. 35.🔍 Which is the odd one out? (a) a ceramic cup (b) a wooden stick (c) a graphite rod (d) a plastic ruler
36. 36.💡 A battery lights 3 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
37. 37.Which of these is safe? (a) keep drinks far away (b) open a phone charger (c) throw cells in a fire (d) use mains for a project
38. 38.🔍 Which is the odd one out? (a) a rice cooker (b) an electric iron (c) a water heater (d) a tube light
39. 39.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
40. 40.What does a tilt switch do? (a) flips up or down (b) stays where you flip it (c) works only while pressed (d) closes when tipped over

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