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Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 404 · 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.🔘 Which kind of switch closes when tipped over? (a) a slide switch (b) a toggle switch (c) a tilt switch (d) a push button
  2. 2.🔌 Is a graphite rod a conductor or an insulator? (a) an insulator (b) a conductor
  3. 3.Which of these is a conductor? (a) a cotton thread (b) a steel spoon (c) a plastic ruler (d) a paper strip
  4. 4.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) the longer line (c) neither line (d) the shorter line
  5. 5.🔗 Series or parallel circuit: “a break stops every bulb”? (a) parallel (b) series
  6. 6.🔋 How many 3 V cells must be joined in series to give 21 V?
  7. 7.⚡ What does a water heater mainly change electricity into? (a) movement (b) light (c) heat (d) sound
  8. 8.🔍 Which is the odd one out? (a) a toaster (b) a tube light (c) a room heater (d) a water heater
  9. 9.True or false: a plastic ruler is an insulator. (a) True (b) False
  10. 10.Which of these is a conductor? (a) a dry cork (b) a steel coin (c) a plastic straw (d) a woollen thread
  11. 11.True or false: a straight line is the symbol for a switch. (a) True (b) False
  12. 12.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) straight lines (c) wavy lines (d) dotted circles
  13. 13.🔋 6 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
  14. 14.💡 2 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?
  15. 15.🔌 Is aluminium foil a conductor or an insulator? (a) a conductor (b) an insulator
  16. 16.🔌 Is a dry cork a conductor or an insulator? (a) an insulator (b) a conductor
  17. 17.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
  18. 18.⚠️ Is it safe to open a phone charger? (a) not safe (b) safe
  19. 19.True or false: a street light mainly gives out light. (a) True (b) False
  20. 20.🔌 Is a safety pin a conductor or an insulator? (a) an insulator (b) a conductor
  21. 21.🔦 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) No (b) Yes
  22. 22.🔋 How many 1.5 V cells must be joined in series to give 4.5 V?
  23. 23.Which of these mainly makes movement? (a) an electric iron (b) an electric drill (c) a tube light (d) a loudspeaker
  24. 24.⚡ What does a table fan mainly change electricity into? (a) sound (b) light (c) movement (d) heat
  25. 25.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) parallel (b) series
  26. 26.True or false: to take cells out after use is safe. (a) True (b) False
  27. 27.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
  28. 28.🔘 A cell and a bulb are joined to 3 side-by-side paths with one switch on each path — A, B and C (parallel). A is OFF, B is ON and C is ON. Does the bulb glow? (a) No (b) Yes
  29. 29.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) open (b) closed
  30. 30.Which of these is not safe? (a) use small battery cells (b) dry your hands first (c) build with an adult near (d) touch a fallen wire
  31. 31.True or false: a reed switch closes near a magnet. (a) False (b) True
  32. 32.🔗 Series or parallel circuit: “each gets the full volts”? (a) series (b) parallel
  33. 33.🔋 What should you do with used-up cells? (a) give them for recycling (b) bury them in soil (c) throw them in a fire (d) cut them open
  34. 34.🔋 Cells joined + to − in a row (series) give … (a) the same voltage (b) a smaller voltage (c) no voltage (d) a bigger voltage
  35. 35.💡 Why is house wiring done in parallel? (a) so all go off together (b) each gets full voltage (c) to save copper only (d) to make bulbs dim
  36. 36.True or false: a graphite rod is an insulator. (a) False (b) True
  37. 37.True or false: to fly kites in open fields is safe. (a) False (b) True
  38. 38.Which drawing is the symbol for a bulb? (a) a dot where wires meet (b) a circle with a cross (c) a long and a short line (d) triangle, bar and arrows
  39. 39.🔌 Is a paper strip a conductor or an insulator? (a) an insulator (b) a conductor
  40. 40.True or false: on a cell, “the flat end” means the − (negative) end. (a) False (b) True

Answer key

  1. a tilt switch
  2. a conductor
  3. a steel spoon
  4. the longer line
  5. series
  6. 7
  7. heat
  8. a tube light
  9. True
  10. a steel coin
  11. False
  12. straight lines
  13. 6
  14. 0
  15. a conductor
  16. an insulator
  17. False
  18. not safe
  19. True
  20. a conductor
  21. No
  22. 3
  23. an electric drill
  24. movement
  25. series
  26. True
  27. False
  28. Yes
  29. open
  30. touch a fallen wire
  31. True
  32. parallel
  33. give them for recycling
  34. a bigger voltage
  35. each gets full voltage
  36. False
  37. True
  38. a circle with a cross
  39. an insulator
  40. True

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