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Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 142 · 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.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
  2. 2.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
  3. 3.🔋 A 6 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
  4. 4.True or false: a doorbell mainly makes sound. (a) False (b) True
  5. 5.🔘 A bulb and a cell are joined through 5 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
  6. 6.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. A gap in one wire is bridged by aluminium foil. Does the bulb glow? (a) No (b) Yes
  7. 7.Which of these is an insulator? (a) a copper wire (b) a plastic ruler (c) a steel coin (d) a brass key
  8. 8.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) LED (b) switch (c) cell (d) diode
  9. 9.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) one (c) two (d) none
  10. 10.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) False (b) True
  11. 11.True or false: to stay away from pylons is not safe. (a) False (b) True
  12. 12.🔋 Cells joined + to − in a row (series) give … (a) no voltage (b) the same voltage (c) a bigger voltage (d) a smaller voltage
  13. 13.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) sound energy (b) chemical energy (c) movement energy (d) light energy
  14. 14.🔍 Which is the odd one out? (a) climb an electric pole (b) fly kites in open fields (c) open a phone charger (d) fly a kite near wires
  15. 15.🔌 Is a plastic straw a conductor or an insulator? (a) a conductor (b) an insulator
  16. 16.Which of these gives us electricity? (a) a mobile phone (b) a generator (c) a computer (d) an air conditioner
  17. 17.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  18. 18.💡 A battery lights 4 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
  19. 19.True or false: a night lamp mainly makes sound. (a) True (b) False
  20. 20.🔍 Which is the odd one out? (a) build with an adult near (b) stop if a part gets hot (c) fly a kite near wires (d) keep drinks far away
  21. 21.🔁 What must there be for a current to flow? (a) a complete loop (b) a broken path (c) a plastic gap (d) one loose end
  22. 22.Which of these means the circuit is closed? (a) the bulb is unscrewed (b) a wire is cut (c) a wire has come loose (d) all wires are joined
  23. 23.True or false: “many paths for current” is true of a series circuit. (a) True (b) False
  24. 24.🔘 Which kind of switch closes when tipped over? (a) a push button (b) a toggle switch (c) a slide switch (d) a tilt switch
  25. 25.🔋 What is a battery? (a) a switch with a lid (b) two or more cells joined (c) a kind of bulb (d) one single wire
  26. 26.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
  27. 27.True or false: if the bulb is unscrewed, the circuit is closed and current flows. (a) False (b) True
  28. 28.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
  29. 29.True or false: a dry cork is an insulator. (a) True (b) False
  30. 30.Which drawing is the symbol for a capacitor? (a) triangle against a bar (b) a circle with an X in it (c) two equal parallel lines (d) a line lifted at a gap
  31. 31.Which of these mainly gives out light? (a) a mixer grinder (b) a torch (c) a school bell (d) a room heater
  32. 32.True or false: a push button closes when tipped over. (a) True (b) False
  33. 33.🔁 Is the circuit closed or open if the switch is OFF? (a) closed (b) open
  34. 34.⚠️ Is it safe to touch a switch when wet? (a) not safe (b) safe
  35. 35.🔘 Which kind of switch slides side to side? (a) a push button (b) a tilt switch (c) a slide switch (d) a toggle switch
  36. 36.🔍 Which is the odd one out? (a) keep drinks far away (b) use small battery cells (c) use a cable with cuts (d) stay away from pylons
  37. 37.Which of these is not safe? (a) keep drinks far away (b) dry your hands first (c) fly a kite near wires (d) use small battery cells
  38. 38.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) so all go off together (c) to save copper only (d) each gets full voltage
  39. 39.True or false: a circle with a cross is the symbol for a battery. (a) False (b) True
  40. 40.⚡ Which tiny particles drift along a metal wire to carry the current? (a) electrons (b) water drops (c) photons (d) dust particles

Answer key

  1. − (negative)
  2. True
  3. 9
  4. True
  5. 5
  6. No
  7. a plastic ruler
  8. diode
  9. one
  10. False
  11. False
  12. a bigger voltage
  13. movement energy
  14. fly kites in open fields
  15. an insulator
  16. a generator
  17. + (positive)
  18. dimmer
  19. False
  20. fly a kite near wires
  21. a complete loop
  22. all wires are joined
  23. False
  24. a tilt switch
  25. two or more cells joined
  26. True
  27. False
  28. False
  29. True
  30. two equal parallel lines
  31. a torch
  32. False
  33. open
  34. not safe
  35. a slide switch
  36. use a cable with cuts
  37. fly a kite near wires
  38. each gets full voltage
  39. False
  40. electrons

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