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Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 638 · 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 drawing is the symbol for a diode? (a) a circle with A inside (b) triangle against a bar (c) a circle with an X in it (d) two or more cell symbols
  2. 2.True or false: many long-short pairs is the symbol for a battery. (a) True (b) False
  3. 3.🔗 Series or parallel circuit: “own switch for each bulb”? (a) parallel (b) series
  4. 4.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) never (b) only when both are ON (c) when either is ON (d) only when both are OFF
  5. 5.True or false: to use a cable with cuts is safe. (a) False (b) True
  6. 6.⚠️ Is it safe to fly a kite near wires? (a) not safe (b) safe
  7. 7.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) True (b) False
  8. 8.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) parallel (b) series
  9. 9.🔌 Which part of a screwdriver should an electrician hold? (a) the steel shaft (b) the metal tip (c) the bare end (d) the plastic handle
  10. 10.🔍 Which is the odd one out? (a) a plastic straw (b) a plastic ruler (c) a steel coin (d) a dry cork
  11. 11.🔦 A circuit has a used-up (dead) 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 dry cork. Does the bulb glow? (a) Yes (b) No
  12. 12.🔋 3 identical 1.2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
  13. 13.Which of these is true of a series circuit? (a) a single current path (b) each gets the full volts (c) one out, the rest glow (d) own switch for each bulb
  14. 14.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
  15. 15.🔋 Does a cell give electricity or use electricity? (a) gives electricity (b) uses electricity
  16. 16.True or false: a toggle switch stays where you flip it. (a) True (b) False
  17. 17.🔋 Does a computer give electricity or use electricity? (a) gives electricity (b) uses electricity
  18. 18.🔌 Why are electric wires covered in plastic? (a) plastic is a conductor (b) to make them heavy (c) plastic makes current (d) plastic is an insulator
  19. 19.True or false: if a wire is cut, the circuit is open and no current flows. (a) False (b) True
  20. 20.True or false: to throw cells in a fire is safe. (a) True (b) False
  21. 21.🔘 What does a switch do in a circuit? (a) changes the voltage (b) stores current (c) makes electricity (d) opens or closes the loop
  22. 22.True or false: a toggle switch closes near a magnet. (a) False (b) True
  23. 23.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a cotton thread across the gap. Does the bulb glow? (a) No (b) Yes
  24. 24.True or false: to use small battery cells is safe. (a) False (b) True
  25. 25.🔌 Is a woollen thread a conductor or an insulator? (a) an insulator (b) a conductor
  26. 26.True or false: a circle with A inside is the symbol for an LED. (a) False (b) True
  27. 27.🔌 Is a wooden stick a conductor or an insulator? (a) a conductor (b) an insulator
  28. 28.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) each gets full voltage (c) so all go off together (d) to save copper only
  29. 29.🔘 Two switches are in series. When does the bulb glow? (a) never (b) when both are OFF (c) when either is ON (d) when both are ON
  30. 30.🔘 Which kind of switch closes when tipped over? (a) a tilt switch (b) a toggle switch (c) a slide switch (d) a push button
  31. 31.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
  32. 32.✏️ In a circuit diagram, which part is drawn as a circle with V inside? (a) voltmeter (b) LED (c) battery (d) junction
  33. 33.Which of these mainly makes movement? (a) a mixer grinder (b) a street light (c) a rice cooker (d) an electric iron
  34. 34.🔘 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 OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
  35. 35.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) neither line (c) the shorter line (d) the longer line
  36. 36.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
  37. 37.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) light energy (b) sound energy (c) chemical energy (d) movement energy
  38. 38.Which of these is a conductor? (a) a metal paper clip (b) a plastic ruler (c) a wooden stick (d) a plastic straw
  39. 39.🔗 Series or parallel circuit: “a single current path”? (a) series (b) parallel
  40. 40.Which of these mainly makes sound? (a) a street light (b) a table fan (c) a buzzer (d) an exhaust fan

Answer key

  1. triangle against a bar
  2. True
  3. parallel
  4. when either is ON
  5. False
  6. not safe
  7. False
  8. series
  9. the plastic handle
  10. a steel coin
  11. No
  12. 1.2
  13. a single current path
  14. False
  15. gives electricity
  16. True
  17. uses electricity
  18. plastic is an insulator
  19. True
  20. False
  21. opens or closes the loop
  22. False
  23. No
  24. True
  25. an insulator
  26. False
  27. an insulator
  28. each gets full voltage
  29. when both are ON
  30. a tilt switch
  31. − (negative)
  32. voltmeter
  33. a mixer grinder
  34. No
  35. the longer line
  36. True
  37. movement energy
  38. a metal paper clip
  39. series
  40. a buzzer

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