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Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 132 · 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.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) when either is ON (b) only when both are OFF (c) never (d) only when both are ON
  2. 2.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  3. 3.Which of these is safe? (a) use mains for a project (b) stop if a part gets hot (c) poke things in a socket (d) touch a switch when wet
  4. 4.🔍 Which is the odd one out? (a) a steel coin (b) a steel spoon (c) a brass key (d) a dry cork
  5. 5.⚡ What does an electric iron mainly change electricity into? (a) sound (b) heat (c) movement (d) light
  6. 6.🔌 A gap of dry air between two wires acts as … (a) a cell (b) an insulator (c) a conductor (d) a switch that is ON
  7. 7.True or false: a line lifted at a gap is the symbol for a switch. (a) False (b) True
  8. 8.True or false: if the switch is OFF, the circuit is closed and current flows. (a) True (b) False
  9. 9.True or false: a plastic ruler is a conductor. (a) True (b) False
  10. 10.🔌 Why are electric wires covered in plastic? (a) plastic is an insulator (b) plastic makes current (c) to make them heavy (d) plastic is a conductor
  11. 11.True or false: a toggle switch closes when tipped over. (a) True (b) False
  12. 12.🔋 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
  13. 13.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a parallel circuit (b) a short circuit (c) an open circuit (d) a safe circuit
  14. 14.🔘 When a switch is ON, the circuit is … (a) cut (b) broken (c) closed (d) open
  15. 15.🔁 What must there be for a current to flow? (a) a broken path (b) a complete loop (c) a plastic gap (d) one loose end
  16. 16.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
  17. 17.🔘 Which kind of switch springs back when let go? (a) a push button (b) a reed switch (c) a toggle switch (d) a slide switch
  18. 18.💡 In a series circuit, how many paths does the current have? (a) one (b) one for each bulb (c) none (d) two
  19. 19.🔋 2 identical 1.2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
  20. 20.🔗 Series or parallel circuit: “own switch for each bulb”? (a) parallel (b) series
  21. 21.🔘 Which kind of switch slides side to side? (a) a tilt switch (b) a push button (c) a slide switch (d) a toggle switch
  22. 22.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) False (b) True
  23. 23.🔗 Series or parallel circuit: “one out, the rest glow”? (a) series (b) parallel
  24. 24.🔍 Which is the odd one out? (a) build with an adult near (b) take cells out after use (c) stay away from pylons (d) climb an electric pole
  25. 25.Which of these uses electricity? (a) a solar panel (b) a mobile phone (c) a battery (d) a cell
  26. 26.True or false: on a cell, “the flat end” means the − (negative) end. (a) False (b) True
  27. 27.Which of these mainly makes sound? (a) a buzzer (b) a street light (c) a toaster (d) a night lamp
  28. 28.🔋 5 identical 1.2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
  29. 29.Which of these uses electricity? (a) a wind turbine (b) a cell (c) a battery (d) a computer
  30. 30.🔌 Is a paper strip a conductor or an insulator? (a) a conductor (b) an insulator
  31. 31.⚠️ Is it safe to throw cells in a fire? (a) safe (b) not safe
  32. 32.Which of these is an insulator? (a) an iron nail (b) aluminium foil (c) a paper strip (d) a graphite rod
  33. 33.🔍 Which is the odd one out? (a) an electric toy car (b) a tube light (c) a mixer grinder (d) a table fan
  34. 34.True or false: to build with an adult near is safe. (a) True (b) False
  35. 35.True or false: to touch a switch when wet is not safe. (a) False (b) True
  36. 36.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
  37. 37.True or false: a push button springs back when let go. (a) True (b) False
  38. 38.Which of these means the circuit is open? (a) all wires are joined (b) the loop is complete (c) a wire is cut (d) the switch is ON
  39. 39.🔋 Does a mobile phone give electricity or use electricity? (a) uses electricity (b) gives electricity
  40. 40.🔌 Is a cotton thread a conductor or an insulator? (a) an insulator (b) a conductor

Answer key

  1. when either is ON
  2. + (positive)
  3. stop if a part gets hot
  4. a dry cork
  5. heat
  6. an insulator
  7. True
  8. False
  9. False
  10. plastic is an insulator
  11. False
  12. give them for recycling
  13. a short circuit
  14. closed
  15. a complete loop
  16. True
  17. a push button
  18. one
  19. 1.2
  20. parallel
  21. a slide switch
  22. False
  23. parallel
  24. climb an electric pole
  25. a mobile phone
  26. True
  27. a buzzer
  28. 1.2
  29. a computer
  30. an insulator
  31. not safe
  32. a paper strip
  33. a tube light
  34. True
  35. True
  36. + (positive)
  37. True
  38. a wire is cut
  39. uses electricity
  40. an insulator

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