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Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 191 · 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: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
  2. 2.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) so all go off together (c) to save copper only (d) each gets full voltage
  3. 3.🔘 A cell and a bulb are joined to two side-by-side paths: path 1 has switches A and B one after another, path 2 has switch C. A is OFF, B is ON and C is ON. Does the bulb glow? (a) No (b) Yes
  4. 4.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) closed (b) open
  5. 5.🔌 Is a steel spoon a conductor or an insulator? (a) an insulator (b) a conductor
  6. 6.True or false: a circle with M inside is the symbol for an ammeter. (a) False (b) True
  7. 7.True or false: a reed switch closes near a magnet. (a) True (b) False
  8. 8.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) by Wi-Fi (c) in parallel (d) in series
  9. 9.🔋 3 identical 3 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
  10. 10.🔦 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
  11. 11.🔍 Which is the odd one out? (a) take cells out after use (b) dry your hands first (c) touch a switch when wet (d) fly kites in open fields
  12. 12.True or false: on a cell, “the flat end” means the − (negative) end. (a) False (b) True
  13. 13.True or false: to stop if a part gets hot is not safe. (a) False (b) True
  14. 14.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  15. 15.True or false: to dry your hands first is not safe. (a) False (b) True
  16. 16.🔋 4 identical 1.5 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
  17. 17.🔌 Is a dry cork a conductor or an insulator? (a) a conductor (b) an insulator
  18. 18.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a safety pin across the gap. Does the bulb glow? (a) No (b) Yes
  19. 19.Which of these mainly makes sound? (a) a table fan (b) a rice cooker (c) a loudspeaker (d) an exhaust fan
  20. 20.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
  21. 21.💡 6 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 3 and 5 are taken out of their holders. How many bulbs glow?
  22. 22.🔘 Which kind of switch stays where you flip it? (a) a toggle switch (b) a slide switch (c) a reed switch (d) a tilt switch
  23. 23.Which of these means the circuit is closed? (a) the bulb is unscrewed (b) a wire has come loose (c) a cell is taken out (d) the loop is complete
  24. 24.🔍 Which is the odd one out? (a) an exhaust fan (b) a loudspeaker (c) a mixer grinder (d) an electric toy car
  25. 25.True or false: an LED lamp mainly makes movement. (a) False (b) True
  26. 26.🔋 Identical cells side by side (in parallel) give … (a) the same voltage (b) double the voltage (c) no voltage (d) half the voltage
  27. 27.🔋 6 identical 3 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
  28. 28.True or false: “one out, the rest glow” is true of a series circuit. (a) False (b) True
  29. 29.True or false: to open a phone charger is safe. (a) True (b) False
  30. 30.Which of these is an insulator? (a) a graphite rod (b) a woollen thread (c) a metal paper clip (d) a steel spoon
  31. 31.⚠️ Is it safe to stop if a part gets hot? (a) safe (b) not safe
  32. 32.⚠️ Is it safe to stay away from pylons? (a) not safe (b) safe
  33. 33.⚡ A cell changes stored chemical energy into which kind of energy? (a) nuclear energy (b) sound energy (c) wind energy (d) electrical energy
  34. 34.💡 A battery lights 5 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
  35. 35.True or false: to touch a switch when wet is not safe. (a) False (b) True
  36. 36.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a rubber eraser across the gap. Does the bulb glow? (a) No (b) Yes
  37. 37.Which of these mainly makes sound? (a) a room heater (b) a school bell (c) a toaster (d) an electric kettle
  38. 38.Which of these is true of a series circuit? (a) used in house wiring (b) a single current path (c) many paths for current (d) own switch for each bulb
  39. 39.True or false: “a single current path” is true of a series circuit. (a) False (b) True
  40. 40.True or false: a steel spoon is an insulator. (a) False (b) True

Answer key

  1. True
  2. each gets full voltage
  3. Yes
  4. open
  5. a conductor
  6. False
  7. True
  8. in series
  9. 3
  10. No
  11. touch a switch when wet
  12. True
  13. False
  14. + (positive)
  15. False
  16. 1.5
  17. an insulator
  18. Yes
  19. a loudspeaker
  20. + (positive)
  21. 4
  22. a toggle switch
  23. the loop is complete
  24. a loudspeaker
  25. False
  26. the same voltage
  27. 3
  28. False
  29. False
  30. a woollen thread
  31. safe
  32. safe
  33. electrical energy
  34. the same
  35. True
  36. No
  37. a school bell
  38. a single current path
  39. True
  40. False

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