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Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 537 · 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.💡 5 identical bulbs are joined in series with a 15 V battery (ideal wires). How many volts does each bulb get? =
  2. 2.💡 In a series circuit, how many paths does the current have? (a) one (b) two (c) one for each bulb (d) none
  3. 3.🔍 Which is the odd one out? (a) a glass marble (b) a wooden stick (c) a brass key (d) a dry cork
  4. 4.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is OFF and B is ON. Does the bulb glow? (a) Yes (b) No
  5. 5.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a glass marble across the gap. Does the bulb glow? (a) Yes (b) No
  6. 6.True or false: to build with an adult near is safe. (a) True (b) False
  7. 7.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
  8. 8.🔦 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
  9. 9.🔦 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
  10. 10.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in series (b) by Wi-Fi (c) in parallel (d) not joined
  11. 11.What does a push button do? (a) works only while pressed (b) flips up or down (c) stays where you flip it (d) closes near a magnet
  12. 12.🔋 4 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
  13. 13.⚠️ Is it safe to touch a fallen wire? (a) safe (b) not safe
  14. 14.True or false: a reed switch closes when tipped over. (a) False (b) True
  15. 15.Which drawing is the symbol for a bulb? (a) two or more cell symbols (b) a circle with M inside (c) a small empty box (d) a circle with a cross
  16. 16.⚠️ Is it safe to keep drinks far away? (a) not safe (b) safe
  17. 17.🔋 What should you do with used-up cells? (a) give them for recycling (b) throw them in a fire (c) bury them in soil (d) cut them open
  18. 18.⚠️ Is it safe to touch a switch when wet? (a) not safe (b) safe
  19. 19.🔍 Which is the odd one out? (a) poke things in a socket (b) use a cable with cuts (c) build with an adult near (d) touch a fallen wire
  20. 20.🔌 Is a brass key a conductor or an insulator? (a) an insulator (b) a conductor
  21. 21.🔁 Is the circuit closed or open if the switch is OFF? (a) closed (b) open
  22. 22.💡 A battery lights 2 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
  23. 23.⚡ What does a ceiling fan mainly change electricity into? (a) movement (b) heat (c) sound (d) light
  24. 24.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
  25. 25.🔗 Series or parallel circuit: “a single current path”? (a) series (b) parallel
  26. 26.🔌 Is a copper wire a conductor or an insulator? (a) an insulator (b) a conductor
  27. 27.Which of these is an insulator? (a) a steel spoon (b) a dry cork (c) aluminium foil (d) a copper wire
  28. 28.True or false: a slide switch closes when tipped over. (a) True (b) False
  29. 29.🔁 Is the circuit closed or open if the switch is ON? (a) open (b) closed
  30. 30.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) voltmeter (b) wire (c) cell (d) junction
  31. 31.🔘 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
  32. 32.Which drawing is the symbol for a capacitor? (a) triangle, bar and arrows (b) two equal parallel lines (c) a circle with V inside (d) a dot where wires meet
  33. 33.🔋 Does a water pump give electricity or use electricity? (a) gives electricity (b) uses electricity
  34. 34.True or false: if all wires are joined, the circuit is open and no current flows. (a) True (b) False
  35. 35.Which of these mainly gives out heat? (a) a street light (b) a room heater (c) an LED lamp (d) an electric drill
  36. 36.What does a slide switch do? (a) stays where you flip it (b) closes near a magnet (c) works only while pressed (d) slides side to side
  37. 37.Which of these is true of a series circuit? (a) a break stops every bulb (b) used in house wiring (c) many paths for current (d) each gets the full volts
  38. 38.True or false: a circle with an X in it is the symbol for a switch. (a) True (b) False
  39. 39.True or false: a long and a short line is the symbol for a cell. (a) True (b) False
  40. 40.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) True (b) False

Answer key

  1. 3
  2. one
  3. a brass key
  4. No
  5. No
  6. True
  7. dimmer
  8. Yes
  9. No
  10. in series
  11. works only while pressed
  12. 3
  13. not safe
  14. False
  15. a circle with a cross
  16. safe
  17. give them for recycling
  18. not safe
  19. build with an adult near
  20. a conductor
  21. open
  22. the same
  23. movement
  24. True
  25. series
  26. a conductor
  27. a dry cork
  28. False
  29. closed
  30. cell
  31. Yes
  32. two equal parallel lines
  33. uses electricity
  34. False
  35. a room heater
  36. slides side to side
  37. a break stops every bulb
  38. False
  39. True
  40. False

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