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Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 289 · 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) 230 V (b) 15 V (c) 1.5 V (d) 0.5 V
  2. 2.⚠️ Is it safe to climb an electric pole? (a) not safe (b) safe
  3. 3.💡 6 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
  4. 4.🔁 Is the circuit closed or open if the switch is ON? (a) closed (b) open
  5. 5.Which of these is not safe? (a) stop if a part gets hot (b) use small battery cells (c) stay away from pylons (d) touch a fallen wire
  6. 6.🔁 What do we call a circuit with a break in it? (a) a series circuit (b) a closed circuit (c) a full circuit (d) an open circuit
  7. 7.🔁 Is the circuit closed or open if a cell is taken out? (a) closed (b) open
  8. 8.True or false: if a cell is taken out, the circuit is open and no current flows. (a) False (b) True
  9. 9.⚠️ Which power source should children use for electronics projects? (a) an inverter socket (b) a small battery pack (c) a wall socket (d) a mains extension board
  10. 10.💡 In a series circuit, how many paths does the current have? (a) two (b) one for each bulb (c) none (d) one
  11. 11.🔦 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
  12. 12.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) movement energy (b) sound energy (c) chemical energy (d) light energy
  13. 13.Which of these uses electricity? (a) a generator (b) a wind turbine (c) a television (d) a battery
  14. 14.🔋 Does a water pump give electricity or use electricity? (a) uses electricity (b) gives electricity
  15. 15.True or false: two equal parallel lines is the symbol for a diode. (a) False (b) True
  16. 16.🔌 Which metal is used for most electric wires at home? (a) rubber (b) glass (c) plastic (d) copper
  17. 17.Which of these mainly gives out heat? (a) an electric toy car (b) a torch (c) an electric drill (d) a water heater
  18. 18.Which of these is true of a series circuit? (a) one out, the rest glow (b) each gets the full volts (c) own switch for each bulb (d) a break stops every bulb
  19. 19.Which of these is true of a series circuit? (a) own switch for each bulb (b) used in house wiring (c) one out, the rest glow (d) one bulb out, all go out
  20. 20.Which of these means the circuit is open? (a) the switch is ON (b) the loop is complete (c) all wires are joined (d) a wire is cut
  21. 21.⚡ A solar panel changes which kind of energy into electricity? (a) light energy (b) sound energy (c) chemical energy (d) wind energy
  22. 22.🔘 A cell and a bulb are joined to two side-by-side paths: path 1 has switches A and B one after another, path 2 has switch C. A is OFF, B is OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
  23. 23.🔘 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 ON, B is ON and C is ON. Does the bulb glow? (a) No (b) Yes
  24. 24.🔍 Which is the odd one out? (a) fly a kite near wires (b) keep drinks far away (c) poke things in a socket (d) climb an electric pole
  25. 25.True or false: to keep drinks far away is safe. (a) True (b) False
  26. 26.🔋 How many 3 V cells must be joined in series to give 6 V?
  27. 27.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  28. 28.True or false: a line lifted at a gap is the symbol for a battery. (a) True (b) False
  29. 29.🔁 What must there be for a current to flow? (a) a broken path (b) one loose end (c) a plastic gap (d) a complete loop
  30. 30.⚠️ Is it safe to touch a fallen wire? (a) safe (b) not safe
  31. 31.🔌 Is a woollen thread a conductor or an insulator? (a) a conductor (b) an insulator
  32. 32.Which of these means the circuit is closed? (a) a wire has come loose (b) a wire is cut (c) the switch is OFF (d) the switch is ON
  33. 33.True or false: on a cell, “the flat end” means the − (negative) end. (a) True (b) False
  34. 34.🔋 6 identical 3 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
  35. 35.🔁 Is the circuit closed or open if a wire has come loose? (a) closed (b) open
  36. 36.🔋 How many 1.5 V cells must be joined in series to give 12 V?
  37. 37.🔋 Does a mobile phone give electricity or use electricity? (a) gives electricity (b) uses electricity
  38. 38.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) by Wi-Fi (c) not joined (d) in series
  39. 39.True or false: a small empty box is the symbol for a resistor. (a) False (b) True
  40. 40.True or false: “many paths for current” is true of a series circuit. (a) False (b) True

Answer key

  1. 1.5 V
  2. not safe
  3. 6
  4. closed
  5. touch a fallen wire
  6. an open circuit
  7. open
  8. True
  9. a small battery pack
  10. one
  11. Yes
  12. movement energy
  13. a television
  14. uses electricity
  15. False
  16. copper
  17. a water heater
  18. a break stops every bulb
  19. one bulb out, all go out
  20. a wire is cut
  21. light energy
  22. No
  23. Yes
  24. keep drinks far away
  25. True
  26. 2
  27. + (positive)
  28. False
  29. a complete loop
  30. not safe
  31. an insulator
  32. the switch is ON
  33. True
  34. 3
  35. open
  36. 8
  37. uses electricity
  38. in series
  39. True
  40. False

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