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Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 581 · 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.🔋 How many volts does one ordinary torch cell give? (a) 0.5 V (b) 15 V (c) 1.5 V (d) 230 V
  2. 2.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
  3. 3.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a break stops every bulb (c) own switch for each bulb (d) bulbs share the voltage
  4. 4.Which of these means the circuit is open? (a) the switch is ON (b) the loop is complete (c) a wire has come loose (d) all wires are joined
  5. 5.🔁 Is the circuit closed or open if the switch is ON? (a) closed (b) open
  6. 6.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
  7. 7.💡 A battery lights 3 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.True or false: to stop if a part gets hot is not safe. (a) True (b) False
  9. 9.True or false: a cotton thread is an insulator. (a) False (b) True
  10. 10.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a plug top (b) a bulb (c) a fuse or MCB (d) a long wire
  11. 11.True or false: a copper wire is an insulator. (a) True (b) False
  12. 12.Which of these is not safe? (a) stop if a part gets hot (b) build with an adult near (c) use mains for a project (d) fly kites in open fields
  13. 13.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  14. 14.Which of these mainly gives out light? (a) a traffic signal (b) a mixer grinder (c) a room heater (d) a rice cooker
  15. 15.True or false: a safety pin is an insulator. (a) True (b) False
  16. 16.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  17. 17.🔁 Is the circuit closed or open if a cell is taken out? (a) open (b) closed
  18. 18.🔍 Which is the odd one out? (a) a graphite rod (b) a metal paper clip (c) a plastic straw (d) a copper wire
  19. 19.True or false: a safety pin is a conductor. (a) False (b) True
  20. 20.True or false: a doorbell mainly gives out heat. (a) True (b) False
  21. 21.🔌 Is a cotton thread a conductor or an insulator? (a) an insulator (b) a conductor
  22. 22.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
  23. 23.🔦 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
  24. 24.🔁 What do we call a circuit with a break in it? (a) a full circuit (b) a series circuit (c) an open circuit (d) a closed circuit
  25. 25.⚠️ Is it safe to fly a kite near wires? (a) safe (b) not safe
  26. 26.True or false: a street light mainly gives out heat. (a) False (b) True
  27. 27.Which of these gives us electricity? (a) a cell (b) a refrigerator (c) a mobile phone (d) a computer
  28. 28.🔘 Which kind of switch flips up or down? (a) a tilt switch (b) a reed switch (c) a slide switch (d) a toggle switch
  29. 29.True or false: to fly kites in open fields is not safe. (a) True (b) False
  30. 30.🔦 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) No (b) Yes
  31. 31.🔌 Which metal is used for most electric wires at home? (a) rubber (b) plastic (c) glass (d) copper
  32. 32.🔘 When a switch is ON, the circuit is … (a) open (b) cut (c) closed (d) broken
  33. 33.🔋 Does a wind turbine give electricity or use electricity? (a) uses electricity (b) gives electricity
  34. 34.True or false: a water heater mainly gives out light. (a) True (b) False
  35. 35.🔍 Which is the odd one out? (a) a mixer grinder (b) a street light (c) an LED lamp (d) a night lamp
  36. 36.🔦 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 dry cork. Does the bulb glow? (a) Yes (b) No
  37. 37.🔘 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 ON, C is OFF and D is OFF. Does the bulb glow? (a) No (b) Yes
  38. 38.True or false: a street light mainly gives out light. (a) True (b) False
  39. 39.⚠️ Is it safe to fly kites in open fields? (a) not safe (b) safe
  40. 40.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) diode (b) battery (c) cell (d) LED

Answer key

  1. 1.5 V
  2. series
  3. own switch for each bulb
  4. a wire has come loose
  5. closed
  6. True
  7. dimmer
  8. False
  9. True
  10. a fuse or MCB
  11. False
  12. use mains for a project
  13. − (negative)
  14. a traffic signal
  15. False
  16. + (positive)
  17. open
  18. a plastic straw
  19. True
  20. False
  21. an insulator
  22. True
  23. Yes
  24. an open circuit
  25. not safe
  26. False
  27. a cell
  28. a toggle switch
  29. False
  30. No
  31. copper
  32. closed
  33. gives electricity
  34. False
  35. a mixer grinder
  36. No
  37. Yes
  38. True
  39. safe
  40. cell

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