Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 657 · 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 mainly makes sound? (a) a night lamp (b) a water heater (c) a buzzer (d) a street light
2. 2.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) it does not matter (b) only one (c) both of them (d) none
3. 3.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
4. 4.🔦 A circuit has a used-up (dead) cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
5. 5.🔘 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
6. 6.Which of these mainly gives out light? (a) an LED lamp (b) a rice cooker (c) a loudspeaker (d) a room heater
7. 7.What does a toggle switch do? (a) slides side to side (b) stays where you flip it (c) works only while pressed (d) closes when tipped over
8. 8.💡 A battery lights 3 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
9. 9.🔌 Is a woollen thread a conductor or an insulator? (a) a conductor (b) an insulator
10. 10.True or false: “used in house wiring” is true of a series circuit. (a) False (b) True
11. 11.🔘 Which kind of switch flips up or down? (a) a push button (b) a tilt switch (c) a toggle switch (d) a slide switch
12. 12.💡 A battery lights 4 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
13. 13.💡 5 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 5 is taken out of its holder. Does bulb 4 glow? (a) Yes (b) No
14. 14.🔌 A gap of dry air between two wires acts as … (a) a switch that is ON (b) an insulator (c) a cell (d) a conductor
15. 15.✏️ In a cell symbol, which line is the + terminal? (a) the longer line (b) neither line (c) the shorter line (d) both lines
16. 16.🔗 Series or parallel circuit: “many paths for current”? (a) parallel (b) series
17. 17.🔋 4 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
18. 18.🔘 A cell and a bulb are joined to 4 side-by-side paths with one switch on each path — A, B, C and D (parallel). A is ON, B is OFF, C is OFF and D is ON. Does the bulb glow? (a) Yes (b) No
19. 19.✏️ In a circuit diagram, which part is drawn as a dot where wires meet? (a) junction (b) diode (c) ammeter (d) bulb
20. 20.⚡ What do we call a flow of electric charge through a wire? (a) a magnet (b) friction (c) sound (d) electric current
21. 21.🔋 5 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
22. 22.🔌 Is a steel coin a conductor or an insulator? (a) a conductor (b) an insulator
23. 23.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a plastic ruler. Does the bulb glow? (a) Yes (b) No
24. 24.True or false: to climb an electric pole is safe. (a) True (b) False
25. 25.💡 Why is house wiring done in parallel? (a) so all go off together (b) to save copper only (c) each gets full voltage (d) to make bulbs dim
26. 26.🔘 When a switch is ON, the circuit is … (a) broken (b) open (c) cut (d) closed
27. 27.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. How many bulbs glow?
28. 28.True or false: “used in house wiring” is true of a parallel circuit. (a) True (b) False
29. 29.🔋 Does a television give electricity or use electricity? (a) uses electricity (b) gives electricity
30. 30.⚡ Which tiny particles drift along a metal wire to carry the current? (a) photons (b) dust particles (c) water drops (d) electrons
31. 31.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) False (b) True
32. 32.Which drawing is the symbol for a resistor? (a) a small empty box (b) a circle with V inside (c) a straight line (d) two or more cell symbols
33. 33.🔗 Series or parallel circuit: “own switch for each bulb”? (a) parallel (b) series
34. 34.Which of these means the circuit is closed? (a) the switch is OFF (b) a wire is cut (c) a cell is taken out (d) all wires are joined
35. 35.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
36. 36.True or false: if a wire has come loose, the circuit is closed and current flows. (a) True (b) False
37. 37.True or false: if all wires are joined, the circuit is open and no current flows. (a) False (b) True
38. 38.🔘 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 OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
39. 39.🔋 What should you do with used-up cells? (a) throw them in a fire (b) give them for recycling (c) cut them open (d) bury them in soil
40. 40.True or false: if a cell is taken out, the circuit is closed and current flows. (a) True (b) False

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