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Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 41 · 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 is the odd one out? (a) a metal paper clip (b) a safety pin (c) a graphite rod (d) a wooden stick
  2. 2.🔋 What is a battery? (a) one single wire (b) a switch with a lid (c) two or more cells joined (d) a kind of bulb
  3. 3.⚡ What does a torch mainly change electricity into? (a) heat (b) light (c) sound (d) movement
  4. 4.🔌 Which metal is used for most electric wires at home? (a) copper (b) rubber (c) plastic (d) glass
  5. 5.🔦 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) Yes (b) No
  6. 6.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. How many bulbs glow?
  7. 7.🔍 Which is the odd one out? (a) touch a switch when wet (b) touch a fallen wire (c) fly a kite near wires (d) stop if a part gets hot
  8. 8.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. How many bulbs glow?
  9. 9.🔍 Which is the odd one out? (a) a dry cork (b) a copper wire (c) aluminium foil (d) a steel coin
  10. 10.True or false: aluminium foil is a conductor. (a) True (b) False
  11. 11.🔍 Which is the odd one out? (a) take cells out after use (b) poke things in a socket (c) climb an electric pole (d) open a phone charger
  12. 12.True or false: a rubber band is an insulator. (a) False (b) True
  13. 13.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) open (b) closed
  14. 14.Which of these mainly makes movement? (a) a traffic signal (b) a buzzer (c) an electric iron (d) an electric drill
  15. 15.True or false: to fly kites in open fields is safe. (a) True (b) False
  16. 16.True or false: a slide switch slides side to side. (a) False (b) True
  17. 17.🔋 Cells joined + to − in a row (series) give … (a) a smaller voltage (b) no voltage (c) a bigger voltage (d) the same voltage
  18. 18.🔋 How many 3 V cells must be joined in series to give 21 V?
  19. 19.⚡ What do we call a flow of electric charge through a wire? (a) electric current (b) sound (c) friction (d) a magnet
  20. 20.Which of these gives us electricity? (a) a refrigerator (b) a washing machine (c) a solar panel (d) a television
  21. 21.🔌 Is a metal paper clip a conductor or an insulator? (a) an insulator (b) a conductor
  22. 22.Which of these is an insulator? (a) a copper wire (b) a steel spoon (c) an iron nail (d) a rubber eraser
  23. 23.Which of these gives us electricity? (a) a refrigerator (b) a washing machine (c) a television (d) a wind turbine
  24. 24.💡 2 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
  25. 25.🔦 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 glass marble. Does the bulb glow? (a) No (b) Yes
  26. 26.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a woollen thread. Does the bulb glow? (a) No (b) Yes
  27. 27.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
  28. 28.💡 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
  29. 29.🔋 Does a cell give electricity or use electricity? (a) uses electricity (b) gives electricity
  30. 30.🔍 Which is the odd one out? (a) a doorbell (b) an LED lamp (c) a loudspeaker (d) a buzzer
  31. 31.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
  32. 32.True or false: a plain rectangle is the symbol for a resistor. (a) True (b) False
  33. 33.Which of these uses electricity? (a) a solar panel (b) a generator (c) a television (d) a wind turbine
  34. 34.True or false: a circle with M inside is the symbol for a motor. (a) True (b) False
  35. 35.What does a tilt switch do? (a) flips up or down (b) stays where you flip it (c) closes when tipped over (d) closes near a magnet
  36. 36.💡 A battery lights 5 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
  37. 37.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a rubber band across the gap. Does the bulb glow? (a) Yes (b) No
  38. 38.🔋 What should you do with used-up cells? (a) throw them in a fire (b) bury them in soil (c) give them for recycling (d) cut them open
  39. 39.⚡ What does a ceiling fan mainly change electricity into? (a) heat (b) sound (c) movement (d) light
  40. 40.🔋 How many 1.2 V cells must be joined in series to give 7.2 V?

Answer key

  1. a wooden stick
  2. two or more cells joined
  3. light
  4. copper
  5. No
  6. 0
  7. stop if a part gets hot
  8. 4
  9. a dry cork
  10. True
  11. take cells out after use
  12. True
  13. open
  14. an electric drill
  15. True
  16. True
  17. a bigger voltage
  18. 7
  19. electric current
  20. a solar panel
  21. a conductor
  22. a rubber eraser
  23. a wind turbine
  24. 3
  25. No
  26. No
  27. − (negative)
  28. in series
  29. gives electricity
  30. an LED lamp
  31. False
  32. True
  33. a television
  34. True
  35. closes when tipped over
  36. the same
  37. No
  38. give them for recycling
  39. movement
  40. 6

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