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Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 338 · 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 uses electricity? (a) a solar panel (b) a bicycle dynamo (c) a power station (d) a computer
  2. 2.Which of these uses electricity? (a) a television (b) a power station (c) a wind turbine (d) a solar panel
  3. 3.🔌 Why are electric wires covered in plastic? (a) plastic is a conductor (b) to make them heavy (c) plastic makes current (d) plastic is an insulator
  4. 4.⚠️ Is it safe to fly kites in open fields? (a) not safe (b) safe
  5. 5.Which of these is true of a series circuit? (a) own switch for each bulb (b) used in house wiring (c) one bulb out, all go out (d) many paths for current
  6. 6.True or false: a push button works only while pressed. (a) False (b) True
  7. 7.True or false: a brass key is an insulator. (a) True (b) False
  8. 8.🔁 Is the circuit closed or open if a cell is taken out? (a) closed (b) open
  9. 9.True or false: a siren mainly makes sound. (a) True (b) False
  10. 10.🔋 Does a computer give electricity or use electricity? (a) gives electricity (b) uses electricity
  11. 11.True or false: triangle against a bar is the symbol for a motor. (a) True (b) False
  12. 12.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
  13. 13.🔘 A bulb and a cell are joined through 6 switches on 6 side-by-side paths, one switch on each path (parallel). What is the smallest number of switches that must be ON to light the bulb?
  14. 14.💡 3 identical bulbs are in parallel and each bulb has its own switch on its path. 2 of the switches are OFF and the rest are ON. How many bulbs glow?
  15. 15.🔁 Is the circuit closed or open if the switch is OFF? (a) closed (b) open
  16. 16.True or false: on a cell, “the flat end” means the + (positive) end. (a) False (b) True
  17. 17.🔍 Which is the odd one out? (a) an iron nail (b) a glass marble (c) a brass key (d) a steel spoon
  18. 18.🔋 A 12 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
  19. 19.True or false: a circle with M inside is the symbol for a motor. (a) True (b) False
  20. 20.True or false: a slide switch slides side to side. (a) False (b) True
  21. 21.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) parallel (b) series
  22. 22.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is OFF, B is OFF and C is ON. Does the bulb glow? (a) No (b) Yes
  23. 23.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True
  24. 24.🔁 Is the circuit closed or open if the loop is complete? (a) closed (b) open
  25. 25.🔍 Which is the odd one out? (a) a siren (b) a school bell (c) a loudspeaker (d) a mixer grinder
  26. 26.🔋 3 identical 2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
  27. 27.🔍 Which is the odd one out? (a) use small battery cells (b) fly a kite near wires (c) use mains for a project (d) poke things in a socket
  28. 28.🔍 Which is the odd one out? (a) stop if a part gets hot (b) keep drinks far away (c) stay away from pylons (d) throw cells in a fire
  29. 29.True or false: a traffic signal mainly gives out light. (a) True (b) False
  30. 30.🔌 A gap of dry air between two wires acts as … (a) a conductor (b) an insulator (c) a cell (d) a switch that is ON
  31. 31.💡 4 identical bulbs are in parallel and each bulb has its own switch on its path. 3 of the switches are OFF and the rest are ON. How many bulbs glow?
  32. 32.True or false: to dry your hands first is safe. (a) False (b) True
  33. 33.⚠️ Is it safe to poke things in a socket? (a) not safe (b) safe
  34. 34.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) parallel (b) series
  35. 35.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they all go out (c) they explode (d) they keep glowing
  36. 36.True or false: a mixer grinder mainly makes movement. (a) False (b) True
  37. 37.🔋 Identical cells side by side (in parallel) give … (a) no voltage (b) half the voltage (c) double the voltage (d) the same voltage
  38. 38.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
  39. 39.🔋 How many 1.5 V cells must be joined in series to give 7.5 V?
  40. 40.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a ceramic cup across the gap. Does the bulb glow? (a) Yes (b) No

Answer key

  1. a computer
  2. a television
  3. plastic is an insulator
  4. safe
  5. one bulb out, all go out
  6. True
  7. False
  8. open
  9. True
  10. uses electricity
  11. False
  12. − (negative)
  13. 1
  14. 1
  15. open
  16. False
  17. a glass marble
  18. 16.5
  19. True
  20. True
  21. series
  22. No
  23. True
  24. closed
  25. a mixer grinder
  26. 2
  27. use small battery cells
  28. throw cells in a fire
  29. True
  30. an insulator
  31. 1
  32. True
  33. not safe
  34. series
  35. they keep glowing
  36. True
  37. the same voltage
  38. − (negative)
  39. 5
  40. No

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