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Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 369 · 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.💡 6 identical bulbs are in parallel and each bulb has its own switch on its path. 5 of the switches are OFF and the rest are ON. How many bulbs glow?
  2. 2.Which of these is not safe? (a) build with an adult near (b) stop if a part gets hot (c) touch a switch when wet (d) take cells out after use
  3. 3.🔍 Which is the odd one out? (a) use mains for a project (b) throw cells in a fire (c) use a cable with cuts (d) stop if a part gets hot
  4. 4.Which of these mainly gives out heat? (a) an electric toy car (b) a torch (c) an electric kettle (d) a loudspeaker
  5. 5.True or false: triangle against a bar is the symbol for a voltmeter. (a) True (b) False
  6. 6.🔘 When a switch is ON, the circuit is … (a) broken (b) cut (c) open (d) closed
  7. 7.🔍 Which is the odd one out? (a) a night lamp (b) a torch (c) a tube light (d) a doorbell
  8. 8.True or false: one tall, one short bar is the symbol for a resistor. (a) False (b) True
  9. 9.🔋 How many 1.2 V cells must be joined in series to give 7.2 V?
  10. 10.True or false: a push button works only while pressed. (a) False (b) True
  11. 11.🔋 A 3 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
  12. 12.🔦 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
  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.Which of these is true of a parallel circuit? (a) a single current path (b) one bulb out, all go out (c) bulbs share the voltage (d) each gets the full volts
  15. 15.True or false: a toggle switch stays where you flip it. (a) False (b) True
  16. 16.🔗 Series or parallel circuit: “used in house wiring”? (a) series (b) parallel
  17. 17.True or false: an iron nail is an insulator. (a) False (b) True
  18. 18.🔍 Which is the odd one out? (a) a ceiling fan (b) a table fan (c) a mixer grinder (d) a school bell
  19. 19.Which of these means the circuit is closed? (a) the loop is complete (b) the bulb is unscrewed (c) a wire is cut (d) a wire has come loose
  20. 20.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
  21. 21.🔋 Does a generator give electricity or use electricity? (a) gives electricity (b) uses electricity
  22. 22.🔍 Which is the odd one out? (a) a rice cooker (b) an LED lamp (c) a traffic signal (d) a torch
  23. 23.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
  24. 24.True or false: to use mains for a project is not safe. (a) False (b) True
  25. 25.Which of these is not safe? (a) use small battery cells (b) fly kites in open fields (c) throw cells in a fire (d) keep drinks far away
  26. 26.Which drawing is the symbol for a cell? (a) a circle with a cross (b) two or more cell symbols (c) a long and a short line (d) a plain rectangle
  27. 27.✏️ In a circuit diagram, which part is drawn as a circle with V inside? (a) switch (b) wire (c) ammeter (d) voltmeter
  28. 28.🔍 Which is the odd one out? (a) an electric toy car (b) a table fan (c) a siren (d) an electric drill
  29. 29.✏️ In a circuit diagram, wires are usually drawn as … (a) wavy lines (b) straight lines (c) dotted circles (d) little stars
  30. 30.🔘 Which kind of switch stays where you flip it? (a) a tilt switch (b) a reed switch (c) a toggle switch (d) a push button
  31. 31.⚡ A cell changes stored chemical energy into which kind of energy? (a) sound energy (b) wind energy (c) nuclear energy (d) electrical energy
  32. 32.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
  33. 33.🔁 Is the circuit closed or open if the loop is complete? (a) open (b) closed
  34. 34.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they keep glowing (b) they get dimmer (c) they all go out (d) they explode
  35. 35.🔦 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) Yes (b) No
  36. 36.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
  37. 37.🔌 Most metals are good … (a) magnets only (b) conductors (c) insulators (d) batteries
  38. 38.⚠️ Is it safe to build with an adult near? (a) not safe (b) safe
  39. 39.⚠️ Is it safe to touch a switch when wet? (a) not safe (b) safe
  40. 40.True or false: two equal parallel lines is the symbol for a cell. (a) False (b) True

Answer key

  1. 1
  2. touch a switch when wet
  3. stop if a part gets hot
  4. an electric kettle
  5. False
  6. closed
  7. a doorbell
  8. False
  9. 6
  10. True
  11. 9
  12. Yes
  13. 6
  14. each gets the full volts
  15. True
  16. parallel
  17. False
  18. a school bell
  19. the loop is complete
  20. + (positive)
  21. gives electricity
  22. a rice cooker
  23. + (positive)
  24. True
  25. throw cells in a fire
  26. a long and a short line
  27. voltmeter
  28. a siren
  29. straight lines
  30. a toggle switch
  31. electrical energy
  32. dimmer
  33. closed
  34. they keep glowing
  35. No
  36. − (negative)
  37. conductors
  38. safe
  39. not safe
  40. False

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