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Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 757 · 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: on a cell, “usually the black wire” means the − (negative) end. (a) True (b) False
  2. 2.Which of these is true of a series circuit? (a) many paths for current (b) used in house wiring (c) bulbs share the voltage (d) own switch for each bulb
  3. 3.Which of these is safe? (a) keep drinks far away (b) poke things in a socket (c) touch a switch when wet (d) use a cable with cuts
  4. 4.🔋 Does a water pump give electricity or use electricity? (a) uses electricity (b) gives electricity
  5. 5.🔋 What is a battery? (a) a switch with a lid (b) one single wire (c) two or more cells joined (d) a kind of bulb
  6. 6.🔌 Is a copper wire a conductor or an insulator? (a) a conductor (b) an insulator
  7. 7.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a safety pin across the gap. Does the bulb glow? (a) Yes (b) No
  8. 8.True or false: a traffic signal mainly gives out light. (a) True (b) False
  9. 9.🔋 7 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  10. 10.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
  11. 11.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is ON and B is OFF. Does the bulb glow? (a) No (b) Yes
  12. 12.🔋 Does a power station give electricity or use electricity? (a) gives electricity (b) uses electricity
  13. 13.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) in parallel (c) by Wi-Fi (d) in series
  14. 14.🔁 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
  15. 15.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
  16. 16.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
  17. 17.🔋 5 identical 1.5 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
  18. 18.What does a tilt switch do? (a) closes when tipped over (b) springs back when let go (c) flips up or down (d) closes near a magnet
  19. 19.💡 2 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
  20. 20.⚡ What does a ceiling fan mainly change electricity into? (a) sound (b) light (c) movement (d) heat
  21. 21.True or false: a circle with M inside is the symbol for a battery. (a) False (b) True
  22. 22.True or false: a room heater mainly gives out heat. (a) True (b) False
  23. 23.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) ammeter (b) switch (c) motor (d) battery
  24. 24.🔌 Is aluminium foil a conductor or an insulator? (a) a conductor (b) an insulator
  25. 25.⚠️ Is it safe to poke things in a socket? (a) safe (b) not safe
  26. 26.Which of these mainly makes sound? (a) a room heater (b) a buzzer (c) a tube light (d) a night lamp
  27. 27.True or false: if the switch is OFF, the circuit is closed and current flows. (a) True (b) False
  28. 28.🔁 Is the circuit closed or open if a wire is cut? (a) open (b) closed
  29. 29.Which drawing is the symbol for a voltmeter? (a) many long-short pairs (b) two or more cell symbols (c) a circle with an X in it (d) a circle with V inside
  30. 30.⚠️ Is it safe to fly kites in open fields? (a) not safe (b) safe
  31. 31.True or false: triangle against a bar is the symbol for a diode. (a) True (b) False
  32. 32.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. Does bulb 2 glow? (a) No (b) Yes
  33. 33.True or false: a tube light mainly gives out light. (a) True (b) False
  34. 34.🔦 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) Yes (b) No
  35. 35.What does a toggle switch do? (a) slides side to side (b) works only while pressed (c) flips up or down (d) springs back when let go
  36. 36.💡 5 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
  37. 37.True or false: a toggle switch works only while pressed. (a) False (b) True
  38. 38.🔘 A cell and a bulb are joined to 2 side-by-side paths with one switch on each path — A and B (parallel). A is OFF and B is ON. Does the bulb glow? (a) No (b) Yes
  39. 39.🔘 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 ON and C is ON. Does the bulb glow? (a) No (b) Yes
  40. 40.⚠️ Is it safe to build with an adult near? (a) not safe (b) safe

Answer key

  1. True
  2. bulbs share the voltage
  3. keep drinks far away
  4. uses electricity
  5. two or more cells joined
  6. a conductor
  7. Yes
  8. True
  9. 14
  10. − (negative)
  11. No
  12. gives electricity
  13. in series
  14. an open circuit
  15. False
  16. + (positive)
  17. 1.5
  18. closes when tipped over
  19. 3
  20. movement
  21. False
  22. True
  23. battery
  24. a conductor
  25. not safe
  26. a buzzer
  27. False
  28. open
  29. a circle with V inside
  30. safe
  31. True
  32. No
  33. True
  34. No
  35. flips up or down
  36. 0.5
  37. False
  38. Yes
  39. Yes
  40. safe

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