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Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 502 · 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.💡 A battery lights 2 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
  2. 2.⚡ What does a rice cooker mainly change electricity into? (a) sound (b) light (c) heat (d) movement
  3. 3.🔦 A circuit has a new 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 rubber eraser. Does the bulb glow? (a) Yes (b) No
  4. 4.🔘 What does a switch do in a circuit? (a) changes the voltage (b) makes electricity (c) opens or closes the loop (d) stores current
  5. 5.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a parallel circuit (b) a safe circuit (c) an open circuit (d) a short circuit
  6. 6.Which drawing is the symbol for a capacitor? (a) one tall, one short bar (b) a circle with an X in it (c) two equal parallel lines (d) many long-short pairs
  7. 7.Which of these mainly makes sound? (a) a water heater (b) a room heater (c) a night lamp (d) a buzzer
  8. 8.Which of these is a conductor? (a) a woollen thread (b) a steel coin (c) a wooden stick (d) a plastic ruler
  9. 9.⚠️ Is it safe to fly kites in open fields? (a) safe (b) not safe
  10. 10.🔁 Is the circuit closed or open if the switch is OFF? (a) open (b) closed
  11. 11.🔘 When a switch is ON, the circuit is … (a) cut (b) broken (c) closed (d) open
  12. 12.Which of these gives us electricity? (a) a computer (b) a television (c) a water pump (d) a generator
  13. 13.🔌 A gap of dry air between two wires acts as … (a) an insulator (b) a conductor (c) a cell (d) a switch that is ON
  14. 14.🔦 A circuit has a new 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 woollen thread. Does the bulb glow? (a) No (b) Yes
  15. 15.True or false: a wooden stick is an insulator. (a) False (b) True
  16. 16.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
  17. 17.🔘 Which kind of switch flips up or down? (a) a slide switch (b) a toggle switch (c) a tilt switch (d) a reed switch
  18. 18.True or false: a metal paper clip is a conductor. (a) True (b) False
  19. 19.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) capacitor (b) bulb (c) voltmeter (d) diode
  20. 20.⚠️ Which power source should children use for electronics projects? (a) an inverter socket (b) a small battery pack (c) a mains extension board (d) a wall socket
  21. 21.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a fuse or MCB (b) a long wire (c) a plug top (d) a bulb
  22. 22.True or false: to stay away from pylons is not safe. (a) True (b) False
  23. 23.🔋 What is a battery? (a) a switch with a lid (b) a kind of bulb (c) one single wire (d) two or more cells joined
  24. 24.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is OFF, B is OFF, C is OFF and D is ON. Does the bulb glow? (a) No (b) Yes
  25. 25.True or false: a school bell mainly makes movement. (a) True (b) False
  26. 26.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) light energy (b) chemical energy (c) movement energy (d) sound energy
  27. 27.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) battery (b) LED (c) switch (d) diode
  28. 28.Which of these is not safe? (a) stay away from pylons (b) build with an adult near (c) touch a switch when wet (d) fly kites in open fields
  29. 29.True or false: to touch a switch when wet is not safe. (a) False (b) True
  30. 30.💡 A battery lights 3 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
  31. 31.True or false: a straight line is the symbol for a wire. (a) False (b) True
  32. 32.True or false: a push button slides side to side. (a) False (b) True
  33. 33.⚡ What does a doorbell mainly change electricity into? (a) light (b) heat (c) sound (d) movement
  34. 34.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) the longer line (c) both lines (d) the shorter line
  35. 35.What does a slide switch do? (a) closes near a magnet (b) flips up or down (c) stays where you flip it (d) slides side to side
  36. 36.True or false: a slide switch slides side to side. (a) True (b) False
  37. 37.True or false: a steel coin is an insulator. (a) True (b) False
  38. 38.Which of these uses electricity? (a) a battery (b) a power station (c) a generator (d) a washing machine
  39. 39.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in series (b) not joined (c) by Wi-Fi (d) in parallel
  40. 40.⚠️ Is it safe to use small battery cells? (a) safe (b) not safe

Answer key

  1. the same
  2. heat
  3. No
  4. opens or closes the loop
  5. a short circuit
  6. two equal parallel lines
  7. a buzzer
  8. a steel coin
  9. safe
  10. open
  11. closed
  12. a generator
  13. an insulator
  14. No
  15. True
  16. True
  17. a toggle switch
  18. True
  19. diode
  20. a small battery pack
  21. a fuse or MCB
  22. False
  23. two or more cells joined
  24. No
  25. False
  26. movement energy
  27. battery
  28. touch a switch when wet
  29. True
  30. the same
  31. True
  32. False
  33. sound
  34. the longer line
  35. slides side to side
  36. True
  37. False
  38. a washing machine
  39. in series
  40. safe

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