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Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 364 · 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.🔌 Is a safety pin a conductor or an insulator? (a) a conductor (b) an insulator
  2. 2.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) to make bulbs dim (c) to save copper only (d) so all go off together
  3. 3.True or false: a circle with an X in it is the symbol for a switch. (a) True (b) False
  4. 4.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) False (b) True
  5. 5.⚠️ Which power source should children use for electronics projects? (a) a small battery pack (b) an inverter socket (c) a wall socket (d) a mains extension board
  6. 6.🔋 What should you do with used-up cells? (a) throw them in a fire (b) cut them open (c) bury them in soil (d) give them for recycling
  7. 7.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. Does bulb 2 glow? (a) Yes (b) No
  8. 8.🔘 Two switches are in series. When does the bulb glow? (a) when both are ON (b) when either is ON (c) never (d) when both are OFF
  9. 9.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
  10. 10.🔌 Which metal is used for most electric wires at home? (a) rubber (b) glass (c) copper (d) plastic
  11. 11.🔋 How many 3 V cells must be joined in series to give 21 V?
  12. 12.💡 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
  13. 13.💡 4 identical bulbs are joined in series with an 8 V battery (ideal wires). How many volts does each bulb get? =
  14. 14.🔌 Is a rubber eraser a conductor or an insulator? (a) an insulator (b) a conductor
  15. 15.🔍 Which is the odd one out? (a) a plastic ruler (b) a rubber band (c) a brass key (d) a cotton thread
  16. 16.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) not joined (c) in series (d) in parallel
  17. 17.True or false: “one out, the rest glow” is true of a parallel circuit. (a) True (b) False
  18. 18.Which of these mainly makes sound? (a) a school bell (b) a room heater (c) a ceiling fan (d) a traffic signal
  19. 19.True or false: a toggle switch flips up or down. (a) False (b) True
  20. 20.🔌 Is a steel spoon a conductor or an insulator? (a) a conductor (b) an insulator
  21. 21.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is OFF, B is OFF and C is OFF. Does the bulb glow? (a) No (b) Yes
  22. 22.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they all go out (c) they keep glowing (d) they explode
  23. 23.🔗 Series or parallel circuit: “own switch for each bulb”? (a) series (b) parallel
  24. 24.Which drawing is the symbol for a capacitor? (a) two equal parallel lines (b) a circle with a cross (c) triangle against a bar (d) a circle with an X in it
  25. 25.True or false: an electric iron mainly makes movement. (a) True (b) False
  26. 26.True or false: if all wires are joined, the circuit is closed and current flows. (a) False (b) True
  27. 27.🔘 Which kind of switch springs back when let go? (a) a reed switch (b) a push button (c) a toggle switch (d) a slide switch
  28. 28.True or false: a water heater mainly gives out heat. (a) False (b) True
  29. 29.Which of these is a conductor? (a) a cotton thread (b) a steel coin (c) a wooden stick (d) a ceramic cup
  30. 30.⚠️ Why must we never touch switches with wet hands? (a) it is just untidy (b) water carries current (c) water makes it cold (d) it spoils the paint
  31. 31.True or false: to climb an electric pole is not safe. (a) True (b) False
  32. 32.⚠️ About how many volts do home sockets in India supply? (a) 12 V (b) 1.5 V (c) 9 V (d) 230 V
  33. 33.True or false: to use mains for a project is safe. (a) True (b) False
  34. 34.Which of these gives us electricity? (a) a television (b) a refrigerator (c) a solar panel (d) a washing machine
  35. 35.🔁 What do we call a circuit with a break in it? (a) a closed circuit (b) an open circuit (c) a series circuit (d) a full circuit
  36. 36.True or false: a cotton thread is an insulator. (a) False (b) True
  37. 37.Which of these is safe? (a) touch a fallen wire (b) dry your hands first (c) fly a kite near wires (d) open a phone charger
  38. 38.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
  39. 39.⚠️ Is it safe to build with an adult near? (a) safe (b) not safe
  40. 40.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 4 is taken out of its holder. Does bulb 5 glow? (a) Yes (b) No

Answer key

  1. a conductor
  2. each gets full voltage
  3. False
  4. True
  5. a small battery pack
  6. give them for recycling
  7. Yes
  8. when both are ON
  9. False
  10. copper
  11. 7
  12. dimmer
  13. 2
  14. an insulator
  15. a brass key
  16. in series
  17. True
  18. a school bell
  19. True
  20. a conductor
  21. No
  22. they keep glowing
  23. parallel
  24. two equal parallel lines
  25. False
  26. True
  27. a push button
  28. True
  29. a steel coin
  30. water carries current
  31. True
  32. 230 V
  33. False
  34. a solar panel
  35. an open circuit
  36. True
  37. dry your hands first
  38. False
  39. safe
  40. No

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