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Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 460 · 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.🔘 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 ON and C is ON. Does the bulb glow? (a) Yes (b) No
  2. 2.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  3. 3.⚡ Which tiny particles drift along a metal wire to carry the current? (a) photons (b) electrons (c) water drops (d) dust particles
  4. 4.⚠️ Why must we never touch switches with wet hands? (a) it spoils the paint (b) water carries current (c) it is just untidy (d) water makes it cold
  5. 5.💡 4 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
  6. 6.🔘 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) Yes (b) No
  7. 7.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) True (b) False
  8. 8.True or false: if a wire has come loose, the circuit is closed and current flows. (a) True (b) False
  9. 9.💡 In a series circuit, how many paths does the current have? (a) none (b) two (c) one (d) one for each bulb
  10. 10.True or false: to take cells out after use is safe. (a) True (b) False
  11. 11.🔋 Cells joined + to − in a row (series) give … (a) a smaller voltage (b) no voltage (c) the same voltage (d) a bigger voltage
  12. 12.True or false: “many paths for current” is true of a parallel circuit. (a) True (b) False
  13. 13.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
  14. 14.⚡ What does an electric drill mainly change electricity into? (a) sound (b) light (c) movement (d) heat
  15. 15.True or false: to poke things in a socket is safe. (a) False (b) True
  16. 16.True or false: a tube light mainly gives out light. (a) False (b) True
  17. 17.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) in series (c) not joined (d) in parallel
  18. 18.⚡ A solar panel changes which kind of energy into electricity? (a) sound energy (b) wind energy (c) light energy (d) chemical energy
  19. 19.Which of these is an insulator? (a) aluminium foil (b) a wooden stick (c) a steel spoon (d) a safety pin
  20. 20.🔌 Is aluminium foil a conductor or an insulator? (a) an insulator (b) a conductor
  21. 21.True or false: a street light mainly gives out light. (a) False (b) True
  22. 22.True or false: two equal parallel lines is the symbol for a resistor. (a) True (b) False
  23. 23.🔌 Is a ceramic cup a conductor or an insulator? (a) a conductor (b) an insulator
  24. 24.Which of these is true of a series circuit? (a) each gets the full volts (b) many paths for current (c) a single current path (d) own switch for each bulb
  25. 25.Which drawing is the symbol for a wire? (a) one tall, one short bar (b) a line lifted at a gap (c) a circle with A inside (d) a straight line
  26. 26.🔍 Which is the odd one out? (a) take cells out after use (b) throw cells in a fire (c) poke things in a socket (d) fly a kite near wires
  27. 27.✏️ Why do engineers draw circuits with symbols? (a) to make it colourful (b) symbols are heavier (c) quick and clear for all (d) to hide the circuit
  28. 28.💡 4 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
  29. 29.True or false: a plastic straw is an insulator. (a) True (b) False
  30. 30.💡 5 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
  31. 31.Which of these is true of a series circuit? (a) each gets the full volts (b) used in house wiring (c) many paths for current (d) one bulb out, all go out
  32. 32.What does a slide switch do? (a) flips up or down (b) closes near a magnet (c) slides side to side (d) stays where you flip it
  33. 33.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
  34. 34.🔗 Series or parallel circuit: “each gets the full volts”? (a) parallel (b) series
  35. 35.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) True (b) False
  36. 36.⚠️ Is it safe to take cells out after use? (a) not safe (b) safe
  37. 37.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
  38. 38.🔌 Is a metal paper clip a conductor or an insulator? (a) an insulator (b) a conductor
  39. 39.⚠️ Is it safe to poke things in a socket? (a) safe (b) not safe
  40. 40.🔘 A cell and a bulb are joined to 4 side-by-side paths with one switch on each path — A, B, C and D (parallel). A is OFF, B is OFF, C is OFF and D is OFF. Does the bulb glow? (a) No (b) Yes

Answer key

  1. No
  2. + (positive)
  3. electrons
  4. water carries current
  5. 6
  6. Yes
  7. True
  8. False
  9. one
  10. True
  11. a bigger voltage
  12. True
  13. − (negative)
  14. movement
  15. False
  16. True
  17. in series
  18. light energy
  19. a wooden stick
  20. a conductor
  21. True
  22. False
  23. an insulator
  24. a single current path
  25. a straight line
  26. take cells out after use
  27. quick and clear for all
  28. 3
  29. True
  30. 1.5
  31. one bulb out, all go out
  32. slides side to side
  33. − (negative)
  34. parallel
  35. True
  36. safe
  37. False
  38. a conductor
  39. not safe
  40. No

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