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Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 201 · 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 of these is not safe? (a) build with an adult near (b) dry your hands first (c) poke things in a socket (d) stop if a part gets hot
  2. 2.⚠️ Is it safe to touch a switch when wet? (a) safe (b) not safe
  3. 3.Which of these is true of a parallel circuit? (a) a single current path (b) many paths for current (c) bulbs share the voltage (d) one bulb out, all go out
  4. 4.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
  5. 5.✏️ Why do engineers draw circuits with symbols? (a) to hide the circuit (b) to make it colourful (c) symbols are heavier (d) quick and clear for all
  6. 6.Which of these is an insulator? (a) a steel coin (b) an iron nail (c) a wooden stick (d) a steel spoon
  7. 7.True or false: a straight line is the symbol for a bulb. (a) True (b) False
  8. 8.🔦 A circuit has a new 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 plastic straw. Does the bulb glow? (a) Yes (b) No
  9. 9.✏️ In a circuit diagram, which part is drawn as a circle with an X in it? (a) ammeter (b) bulb (c) voltmeter (d) resistor
  10. 10.⚡ Which tiny particles drift along a metal wire to carry the current? (a) electrons (b) dust particles (c) water drops (d) photons
  11. 11.True or false: a tilt switch works only while pressed. (a) True (b) False
  12. 12.Which of these gives us electricity? (a) an air conditioner (b) a power station (c) a water pump (d) a washing machine
  13. 13.🔋 How many volts does one ordinary torch cell give? (a) 230 V (b) 1.5 V (c) 0.5 V (d) 15 V
  14. 14.Which of these is true of a parallel circuit? (a) a single current path (b) one bulb out, all go out (c) own switch for each bulb (d) bulbs share the voltage
  15. 15.True or false: a paper strip is an insulator. (a) True (b) False
  16. 16.True or false: a rubber band is a conductor. (a) False (b) True
  17. 17.🔘 Which kind of switch springs back when let go? (a) a push button (b) a slide switch (c) a tilt switch (d) a reed switch
  18. 18.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
  19. 19.True or false: a line lifted at a gap is the symbol for an LED. (a) True (b) False
  20. 20.✏️ In a circuit diagram, wires are usually drawn as … (a) wavy lines (b) little stars (c) dotted circles (d) straight lines
  21. 21.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) parallel (b) series
  22. 22.⚡ What does a ceiling fan mainly change electricity into? (a) heat (b) movement (c) light (d) sound
  23. 23.🔦 A circuit has a used-up (dead) cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
  24. 24.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
  25. 25.⚠️ Is it safe to throw cells in a fire? (a) safe (b) not safe
  26. 26.True or false: a room heater mainly makes sound. (a) False (b) True
  27. 27.🔁 What must there be for a current to flow? (a) a complete loop (b) a plastic gap (c) one loose end (d) a broken path
  28. 28.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the glass (b) the switch (c) the filament (d) the base
  29. 29.⚡ A fan changes electrical energy mainly into which kind of energy? (a) sound energy (b) movement energy (c) light energy (d) chemical energy
  30. 30.Which drawing is the symbol for a resistor? (a) one tall, one short bar (b) triangle against a bar (c) a plain rectangle (d) a circle with an X in it
  31. 31.⚡ What does an electric toy car mainly change electricity into? (a) movement (b) light (c) heat (d) sound
  32. 32.🔍 Which is the odd one out? (a) a dry cork (b) a plastic ruler (c) aluminium foil (d) a glass marble
  33. 33.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) junction (b) cell (c) motor (d) diode
  34. 34.What does a reed switch do? (a) works only while pressed (b) slides side to side (c) springs back when let go (d) closes near a magnet
  35. 35.🔋 6 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  36. 36.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  37. 37.🔦 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
  38. 38.🔦 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
  39. 39.🔘 When a switch is ON, the circuit is … (a) broken (b) closed (c) cut (d) open
  40. 40.💡 2 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. How many bulbs glow?

Answer key

  1. poke things in a socket
  2. not safe
  3. many paths for current
  4. True
  5. quick and clear for all
  6. a wooden stick
  7. False
  8. No
  9. bulb
  10. electrons
  11. False
  12. a power station
  13. 1.5 V
  14. own switch for each bulb
  15. True
  16. False
  17. a push button
  18. + (positive)
  19. False
  20. straight lines
  21. series
  22. movement
  23. No
  24. True
  25. not safe
  26. False
  27. a complete loop
  28. the filament
  29. movement energy
  30. a plain rectangle
  31. movement
  32. aluminium foil
  33. diode
  34. closes near a magnet
  35. 9
  36. − (negative)
  37. Yes
  38. No
  39. closed
  40. 0

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