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Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 172 · 40 questions
TalentJR

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.

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  1. 1.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
  2. 2.Which of these mainly gives out heat? (a) a torch (b) a night lamp (c) a table fan (d) an electric iron
  3. 3.True or false: on a cell, “the flat end” means the − (negative) end. (a) False (b) True
  4. 4.True or false: a reed switch springs back when let go. (a) True (b) False
  5. 5.💡 2 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
  6. 6.Which of these means the circuit is open? (a) the loop is complete (b) the bulb is unscrewed (c) the switch is ON (d) all wires are joined
  7. 7.Which of these gives us electricity? (a) an air conditioner (b) a television (c) a cell (d) a washing machine
  8. 8.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) False (b) True
  9. 9.🔗 Series or parallel circuit: “each gets the full volts”? (a) series (b) parallel
  10. 10.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
  11. 11.✏️ In a circuit diagram, which part is drawn as a circle with V inside? (a) LED (b) switch (c) battery (d) voltmeter
  12. 12.Which of these is true of a series circuit? (a) bulbs share the voltage (b) many paths for current (c) one out, the rest glow (d) used in house wiring
  13. 13.🔋 2 identical 2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
  14. 14.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
  15. 15.Which of these gives us electricity? (a) an air conditioner (b) a generator (c) a refrigerator (d) a television
  16. 16.Which of these gives us electricity? (a) a battery (b) a refrigerator (c) an air conditioner (d) a computer
  17. 17.🔍 Which is the odd one out? (a) an electric kettle (b) a rice cooker (c) an LED lamp (d) an electric iron
  18. 18.True or false: a night lamp mainly gives out light. (a) False (b) True
  19. 19.True or false: a toggle switch works only while pressed. (a) True (b) False
  20. 20.💡 4 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
  21. 21.🔦 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 plastic ruler. Does the bulb glow? (a) No (b) Yes
  22. 22.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
  23. 23.🔍 Which is the odd one out? (a) aluminium foil (b) a steel spoon (c) a steel coin (d) a paper strip
  24. 24.What does a slide switch do? (a) closes near a magnet (b) springs back when let go (c) flips up or down (d) slides side to side
  25. 25.⚠️ Is it safe to stop if a part gets hot? (a) not safe (b) safe
  26. 26.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
  27. 27.💡 A battery lights 3 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
  28. 28.🔌 Is a steel spoon a conductor or an insulator? (a) a conductor (b) an insulator
  29. 29.🔦 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
  30. 30.True or false: “many paths for current” is true of a series circuit. (a) True (b) False
  31. 31.🔍 Which is the odd one out? (a) a paper strip (b) an iron nail (c) a ceramic cup (d) a glass marble
  32. 32.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. Does the bulb glow? (a) No (b) Yes
  33. 33.Which drawing is the symbol for a cell? (a) one tall, one short bar (b) a circle with an X in it (c) a plain rectangle (d) a dot where wires meet
  34. 34.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
  35. 35.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) wire (b) cell (c) voltmeter (d) motor
  36. 36.Which drawing is the symbol for a cell? (a) a straight line (b) triangle against a bar (c) a circle with A inside (d) a long and a short line
  37. 37.🔘 Two switches are in series. When does the bulb glow? (a) never (b) when both are OFF (c) when either is ON (d) when both are ON
  38. 38.True or false: “one out, the rest glow” is true of a parallel circuit. (a) True (b) False
  39. 39.🔋 What is a battery? (a) a kind of bulb (b) a switch with a lid (c) one single wire (d) two or more cells joined
  40. 40.⚡ What does an LED lamp mainly change electricity into? (a) heat (b) sound (c) movement (d) light

Answer key

  1. series
  2. an electric iron
  3. True
  4. False
  5. 3
  6. the bulb is unscrewed
  7. a cell
  8. False
  9. parallel
  10. True
  11. voltmeter
  12. bulbs share the voltage
  13. 2
  14. False
  15. a generator
  16. a battery
  17. an LED lamp
  18. True
  19. False
  20. 2
  21. No
  22. series
  23. a paper strip
  24. slides side to side
  25. safe
  26. − (negative)
  27. dimmer
  28. a conductor
  29. Yes
  30. False
  31. an iron nail
  32. No
  33. one tall, one short bar
  34. False
  35. cell
  36. a long and a short line
  37. when both are ON
  38. True
  39. two or more cells joined
  40. light

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