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Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 751 · 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.True or false: if a wire is cut, the circuit is closed and current flows. (a) False (b) True
  2. 2.What does a slide switch do? (a) springs back when let go (b) works only while pressed (c) slides side to side (d) closes when tipped over
  3. 3.True or false: triangle, bar and arrows is the symbol for a motor. (a) False (b) True
  4. 4.🔘 Which kind of switch springs back when let go? (a) a push button (b) a toggle switch (c) a slide switch (d) a tilt switch
  5. 5.💡 Why is house wiring done in parallel? (a) to save copper only (b) to make bulbs dim (c) each gets full voltage (d) so all go off together
  6. 6.🔘 Which kind of switch flips up or down? (a) a tilt switch (b) a push button (c) a toggle switch (d) a reed switch
  7. 7.True or false: if all wires are joined, the circuit is open and no current flows. (a) True (b) False
  8. 8.🔋 Does a mobile phone give electricity or use electricity? (a) uses electricity (b) gives electricity
  9. 9.💡 5 identical bulbs are joined in parallel (each on its own side-by-side path) with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. Does bulb 3 glow? (a) Yes (b) No
  10. 10.True or false: a reed switch slides side to side. (a) False (b) True
  11. 11.⚠️ Is it safe to keep drinks far away? (a) not safe (b) safe
  12. 12.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
  13. 13.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel spoon across the gap. Does the bulb glow? (a) No (b) Yes
  14. 14.Which of these gives us electricity? (a) a washing machine (b) a computer (c) a solar panel (d) a refrigerator
  15. 15.🔌 Is a steel coin a conductor or an insulator? (a) an insulator (b) a conductor
  16. 16.⚠️ Is it safe to use small battery cells? (a) safe (b) not safe
  17. 17.🔍 Which is the odd one out? (a) a ceramic cup (b) a copper wire (c) a rubber eraser (d) a rubber band
  18. 18.✏️ In a circuit diagram, which part is drawn as a circle with an X in it? (a) cell (b) LED (c) bulb (d) diode
  19. 19.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
  20. 20.True or false: to touch a fallen wire is safe. (a) False (b) True
  21. 21.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
  22. 22.🔌 A gap of dry air between two wires acts as … (a) a switch that is ON (b) a conductor (c) a cell (d) an insulator
  23. 23.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
  24. 24.Which of these is safe? (a) use mains for a project (b) poke things in a socket (c) touch a switch when wet (d) keep drinks far away
  25. 25.🔍 Which is the odd one out? (a) use mains for a project (b) build with an adult near (c) use a cable with cuts (d) fly a kite near wires
  26. 26.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) bulb (b) ammeter (c) battery (d) wire
  27. 27.⚡ What does an electric iron mainly change electricity into? (a) heat (b) light (c) movement (d) sound
  28. 28.True or false: if the switch is OFF, the circuit is closed and current flows. (a) False (b) True
  29. 29.True or false: to stay away from pylons is safe. (a) False (b) True
  30. 30.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. How many bulbs glow?
  31. 31.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
  32. 32.True or false: to fly kites in open fields is not safe. (a) True (b) False
  33. 33.Which drawing is the symbol for a junction? (a) a dot where wires meet (b) a circle with V inside (c) a straight line (d) a small empty box
  34. 34.💡 5 identical bulbs are in parallel and each bulb has its own switch on its path. 4 of the switches are OFF and the rest are ON. How many bulbs glow?
  35. 35.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
  36. 36.True or false: an electric toy car mainly gives out light. (a) False (b) True
  37. 37.🔌 Is an iron nail a conductor or an insulator? (a) an insulator (b) a conductor
  38. 38.What does a toggle switch do? (a) slides side to side (b) works only while pressed (c) stays where you flip it (d) closes when tipped over
  39. 39.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a safe circuit (b) a parallel circuit (c) a short circuit (d) an open circuit
  40. 40.⚠️ Is it safe to open a phone charger? (a) not safe (b) safe

Answer key

  1. False
  2. slides side to side
  3. False
  4. a push button
  5. each gets full voltage
  6. a toggle switch
  7. False
  8. uses electricity
  9. Yes
  10. False
  11. safe
  12. + (positive)
  13. Yes
  14. a solar panel
  15. a conductor
  16. safe
  17. a copper wire
  18. bulb
  19. False
  20. False
  21. False
  22. an insulator
  23. − (negative)
  24. keep drinks far away
  25. build with an adult near
  26. bulb
  27. heat
  28. False
  29. True
  30. 0
  31. No
  32. False
  33. a dot where wires meet
  34. 1
  35. False
  36. False
  37. a conductor
  38. stays where you flip it
  39. a short circuit
  40. not safe

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