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Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 928 · 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.

NameDateTime takenScore ___ / 40
  1. 1.True or false: a rubber band is a conductor. (a) False (b) True
  2. 2.True or false: to take cells out after use is not safe. (a) True (b) False
  3. 3.🔦 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 glass marble. Does the bulb glow? (a) Yes (b) No
  4. 4.True or false: a wooden stick is a conductor. (a) False (b) True
  5. 5.💡 3 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
  6. 6.🔍 Which is the odd one out? (a) aluminium foil (b) a plastic straw (c) a metal paper clip (d) a steel coin
  7. 7.🔘 When a switch is ON, the circuit is … (a) open (b) cut (c) closed (d) broken
  8. 8.💡 5 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
  9. 9.True or false: to use mains for a project is safe. (a) False (b) True
  10. 10.True or false: a graphite rod is an insulator. (a) True (b) False
  11. 11.✏️ In a circuit diagram, which part is drawn as a circle with V inside? (a) switch (b) LED (c) voltmeter (d) junction
  12. 12.🔋 What is a battery? (a) a kind of bulb (b) a switch with a lid (c) two or more cells joined (d) one single wire
  13. 13.Which drawing is the symbol for a motor? (a) a circle with M inside (b) a circle with A inside (c) a straight line (d) a dot where wires meet
  14. 14.Which of these gives us electricity? (a) a mobile phone (b) an air conditioner (c) a battery (d) a washing machine
  15. 15.🔘 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 OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
  16. 16.🔦 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) Yes (b) No
  17. 17.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. How many bulbs glow?
  18. 18.✏️ In a circuit diagram, which part is drawn as triangle, bar and arrows? (a) switch (b) cell (c) LED (d) wire
  19. 19.🔍 Which is the odd one out? (a) open a phone charger (b) poke things in a socket (c) fly kites in open fields (d) fly a kite near wires
  20. 20.True or false: a long and a short line is the symbol for a bulb. (a) False (b) True
  21. 21.🔘 Which kind of switch stays where you flip it? (a) a toggle switch (b) a reed switch (c) a push button (d) a slide switch
  22. 22.Which of these mainly makes movement? (a) an electric toy car (b) a traffic signal (c) an electric iron (d) a buzzer
  23. 23.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  24. 24.True or false: if the loop is complete, the circuit is open and no current flows. (a) False (b) True
  25. 25.True or false: many long-short pairs is the symbol for a battery. (a) True (b) False
  26. 26.True or false: a push button springs back when let go. (a) False (b) True
  27. 27.Which of these means the circuit is closed? (a) a wire is cut (b) the bulb is unscrewed (c) the switch is ON (d) the switch is OFF
  28. 28.🔍 Which is the odd one out? (a) a dry cork (b) a plastic straw (c) a copper wire (d) a cotton thread
  29. 29.🔦 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 brass key. Does the bulb glow? (a) Yes (b) No
  30. 30.🔍 Which is the odd one out? (a) stop if a part gets hot (b) use a cable with cuts (c) use small battery cells (d) fly kites in open fields
  31. 31.True or false: to open a phone charger is safe. (a) True (b) False
  32. 32.True or false: a push button closes near a magnet. (a) True (b) False
  33. 33.True or false: a circle with a cross is the symbol for a bulb. (a) True (b) False
  34. 34.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) bulb (b) battery (c) motor (d) junction
  35. 35.💡 4 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. Bulbs 2 and 3 are taken out of their holders. How many bulbs glow?
  36. 36.Which of these is true of a series circuit? (a) one bulb out, all go out (b) own switch for each bulb (c) each gets the full volts (d) one out, the rest glow
  37. 37.⚠️ Is it safe to take cells out after use? (a) safe (b) not safe
  38. 38.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) False (b) True
  39. 39.True or false: a brass key is a conductor. (a) False (b) True
  40. 40.🔌 A gap of dry air between two wires acts as … (a) a cell (b) a conductor (c) an insulator (d) a switch that is ON

Answer key

  1. False
  2. False
  3. No
  4. False
  5. 0.6
  6. a plastic straw
  7. closed
  8. 12
  9. False
  10. False
  11. voltmeter
  12. two or more cells joined
  13. a circle with M inside
  14. a battery
  15. No
  16. Yes
  17. 5
  18. LED
  19. fly kites in open fields
  20. False
  21. a toggle switch
  22. an electric toy car
  23. − (negative)
  24. False
  25. True
  26. True
  27. the switch is ON
  28. a copper wire
  29. Yes
  30. use a cable with cuts
  31. False
  32. False
  33. True
  34. motor
  35. 2
  36. one bulb out, all go out
  37. safe
  38. True
  39. True
  40. an insulator

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