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Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 569 · 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.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) False (b) True
  2. 2.True or false: to touch a switch when wet is safe. (a) False (b) True
  3. 3.Which of these means the circuit is open? (a) the switch is ON (b) the loop is complete (c) all wires are joined (d) a wire has come loose
  4. 4.True or false: a mixer grinder mainly makes movement. (a) False (b) True
  5. 5.✏️ In a circuit diagram, which part is drawn as triangle, bar and arrows? (a) battery (b) motor (c) ammeter (d) LED
  6. 6.🔗 Series or parallel circuit: “many paths for current”? (a) parallel (b) series
  7. 7.Which of these is true of a series circuit? (a) many paths for current (b) one bulb out, all go out (c) one out, the rest glow (d) each gets the full volts
  8. 8.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
  9. 9.💡 2 identical bulbs are joined in series with a 4 V battery (ideal wires). How many volts does each bulb get? =
  10. 10.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
  11. 11.True or false: a metal paper clip is a conductor. (a) False (b) True
  12. 12.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) in parallel (c) in series (d) by Wi-Fi
  13. 13.🔘 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 OFF and C is ON. Does the bulb glow? (a) Yes (b) No
  14. 14.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
  15. 15.Which of these is a conductor? (a) a woollen thread (b) a paper strip (c) a plastic ruler (d) an iron nail
  16. 16.Which of these means the circuit is open? (a) the switch is ON (b) the loop is complete (c) the switch is OFF (d) all wires are joined
  17. 17.Which of these is an insulator? (a) aluminium foil (b) a graphite rod (c) a steel coin (d) a rubber eraser
  18. 18.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is OFF, B is OFF and C is OFF. Does the bulb glow? (a) No (b) Yes
  19. 19.💡 2 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. All the bulbs are in place. How many bulbs glow?
  20. 20.✏️ In a circuit diagram, which part is drawn as a straight line? (a) motor (b) junction (c) battery (d) wire
  21. 21.What does a push button do? (a) works only while pressed (b) flips up or down (c) stays where you flip it (d) closes when tipped over
  22. 22.Which drawing is the symbol for a capacitor? (a) a straight line (b) one tall, one short bar (c) two equal parallel lines (d) a circle with an X in it
  23. 23.🔍 Which is the odd one out? (a) use small battery cells (b) touch a fallen wire (c) keep drinks far away (d) build with an adult near
  24. 24.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
  25. 25.✏️ In a circuit diagram, which part is drawn as a circle with an X in it? (a) switch (b) battery (c) junction (d) bulb
  26. 26.🔋 Does a computer give electricity or use electricity? (a) uses electricity (b) gives electricity
  27. 27.True or false: a school bell mainly makes sound. (a) False (b) True
  28. 28.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
  29. 29.🔌 Is a plastic ruler a conductor or an insulator? (a) a conductor (b) an insulator
  30. 30.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
  31. 31.True or false: a rubber band is a conductor. (a) True (b) False
  32. 32.⚠️ Is it safe to open a phone charger? (a) safe (b) not safe
  33. 33.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) wait and watch (b) pull them by the hand (c) pour water on them (d) shout for an adult
  34. 34.⚡ What does a street light mainly change electricity into? (a) sound (b) light (c) movement (d) heat
  35. 35.Which drawing is the symbol for a bulb? (a) triangle, bar and arrows (b) a circle with a cross (c) two equal parallel lines (d) a dot where wires meet
  36. 36.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) True (b) False
  37. 37.🔌 Is aluminium foil a conductor or an insulator? (a) an insulator (b) a conductor
  38. 38.💡 4 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
  39. 39.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
  40. 40.True or false: to poke things in a socket is safe. (a) False (b) True

Answer key

  1. False
  2. False
  3. a wire has come loose
  4. True
  5. LED
  6. parallel
  7. one bulb out, all go out
  8. True
  9. 2
  10. + (positive)
  11. True
  12. in series
  13. Yes
  14. False
  15. an iron nail
  16. the switch is OFF
  17. a rubber eraser
  18. No
  19. 2
  20. wire
  21. works only while pressed
  22. two equal parallel lines
  23. touch a fallen wire
  24. False
  25. bulb
  26. uses electricity
  27. True
  28. False
  29. an insulator
  30. − (negative)
  31. False
  32. not safe
  33. shout for an adult
  34. light
  35. a circle with a cross
  36. True
  37. a conductor
  38. 0.4
  39. False
  40. False

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