Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 590 · 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 means the circuit is closed? (a) the switch is ON (b) a wire is cut (c) the switch is OFF (d) the bulb is unscrewed
2. 2.Which of these is a conductor? (a) a plastic ruler (b) a rubber band (c) a plastic straw (d) an iron nail
3. 3.🔘 A bulb and a cell are joined through 2 switches on 2 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?
4. 4.⚠️ Why must we never touch switches with wet hands? (a) water carries current (b) it spoils the paint (c) it is just untidy (d) water makes it cold
5. 5.True or false: “used in house wiring” is true of a series circuit. (a) False (b) True
6. 6.🔘 Which kind of switch works only while pressed? (a) a tilt switch (b) a push button (c) a reed switch (d) a slide switch
7. 7.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
8. 8.🔘 Which kind of switch springs back when let go? (a) a tilt switch (b) a reed switch (c) a push button (d) a toggle switch
9. 9.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) closed (b) open
10. 10.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
11. 11.🔘 Which kind of switch closes near a magnet? (a) a push button (b) a toggle switch (c) a reed switch (d) a tilt switch
12. 12.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
13. 13.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) False (b) True
14. 14.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
15. 15.🔌 Most metals are good … (a) magnets only (b) conductors (c) batteries (d) insulators
16. 16.🔋 Identical cells side by side (in parallel) give … (a) double the voltage (b) the same voltage (c) no voltage (d) half the voltage
17. 17.Which of these is true of a series circuit? (a) used in house wiring (b) one out, the rest glow (c) a break stops every bulb (d) own switch for each bulb
18. 18.🔋 3 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)? =
19. 19.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a safety pin. Does the bulb glow? (a) Yes (b) No
20. 20.True or false: “one out, the rest glow” is true of a parallel circuit. (a) True (b) False
21. 21.True or false: a graphite rod is a conductor. (a) True (b) False
22. 22.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
23. 23.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) the longer line (c) the shorter line (d) neither line
24. 24.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel spoon across the gap. Does the bulb glow? (a) Yes (b) No
25. 25.True or false: a rubber eraser is a conductor. (a) True (b) False
26. 26.💡 5 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
27. 27.Which of these mainly makes sound? (a) a room heater (b) a table fan (c) a school bell (d) an electric iron
28. 28.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) diode (b) switch (c) LED (d) cell
29. 29.Which of these uses electricity? (a) a power station (b) a refrigerator (c) a bicycle dynamo (d) a solar panel
30. 30.🔦 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
31. 31.True or false: on a cell, “the flat end” means the + (positive) end. (a) False (b) True
32. 32.Which of these mainly gives out light? (a) a traffic signal (b) a mixer grinder (c) an electric iron (d) a loudspeaker
33. 33.🔍 Which is the odd one out? (a) a steel spoon (b) a safety pin (c) a rubber eraser (d) aluminium foil
34. 34.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the glass (b) the switch (c) the filament (d) the base
35. 35.True or false: a street light mainly gives out heat. (a) False (b) True
36. 36.True or false: many long-short pairs is the symbol for an LED. (a) True (b) False
37. 37.🔋 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)? =
38. 38.🔦 A circuit has a used-up (dead) 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 cotton thread. Does the bulb glow? (a) Yes (b) No
39. 39.True or false: “many paths for current” is true of a series circuit. (a) True (b) False
40. 40.True or false: a graphite rod is an insulator. (a) False (b) True

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