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Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 303 · 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: a plastic ruler is an insulator. (a) True (b) False
  2. 2.🔍 Which is the odd one out? (a) a loudspeaker (b) an electric iron (c) a room heater (d) an electric kettle
  3. 3.⚠️ About how many volts do home sockets in India supply? (a) 9 V (b) 230 V (c) 1.5 V (d) 12 V
  4. 4.True or false: to build with an adult near is safe. (a) True (b) False
  5. 5.🔁 What do we call a circuit with a break in it? (a) a series circuit (b) an open circuit (c) a closed circuit (d) a full circuit
  6. 6.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
  7. 7.🔍 Which is the odd one out? (a) a steel spoon (b) a metal paper clip (c) a copper wire (d) a plastic ruler
  8. 8.🔍 Which is the odd one out? (a) a brass key (b) a safety pin (c) aluminium foil (d) a plastic straw
  9. 9.🔘 Which kind of switch slides side to side? (a) a push button (b) a reed switch (c) a slide switch (d) a toggle switch
  10. 10.True or false: to use a cable with cuts is not safe. (a) True (b) False
  11. 11.True or false: to fly kites in open fields is not safe. (a) False (b) True
  12. 12.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
  13. 13.True or false: a safety pin is an insulator. (a) False (b) True
  14. 14.What does a push button do? (a) closes near a magnet (b) flips up or down (c) closes when tipped over (d) works only while pressed
  15. 15.🔁 Is the circuit closed or open if a cell is taken out? (a) open (b) closed
  16. 16.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they keep glowing (b) they get dimmer (c) they explode (d) they all go out
  17. 17.Which of these is a conductor? (a) a steel coin (b) a plastic ruler (c) a paper strip (d) a rubber eraser
  18. 18.✏️ In a cell symbol, which line is the + terminal? (a) the longer line (b) neither line (c) the shorter line (d) both lines
  19. 19.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) True (b) False
  20. 20.🔋 Does a washing machine give electricity or use electricity? (a) gives electricity (b) uses electricity
  21. 21.🔘 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 OFF. Does the bulb glow? (a) No (b) Yes
  22. 22.True or false: a plain rectangle is the symbol for an LED. (a) False (b) True
  23. 23.⚠️ Is it safe to touch a fallen wire? (a) safe (b) not safe
  24. 24.🔦 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 paper strip. Does the bulb glow? (a) No (b) Yes
  25. 25.🔗 Series or parallel circuit: “used in house wiring”? (a) parallel (b) series
  26. 26.Which of these uses electricity? (a) a wind turbine (b) a solar panel (c) a battery (d) a mobile phone
  27. 27.✏️ Why do engineers draw circuits with symbols? (a) symbols are heavier (b) to make it colourful (c) quick and clear for all (d) to hide the circuit
  28. 28.⚠️ Is it safe to fly kites in open fields? (a) not safe (b) safe
  29. 29.🔌 Which metal is used for most electric wires at home? (a) rubber (b) copper (c) glass (d) plastic
  30. 30.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
  31. 31.Which of these is not safe? (a) keep drinks far away (b) stop if a part gets hot (c) dry your hands first (d) climb an electric pole
  32. 32.True or false: a buzzer mainly makes sound. (a) False (b) True
  33. 33.⚠️ Is it safe to stay away from pylons? (a) safe (b) not safe
  34. 34.True or false: if a cell is taken out, the circuit is open and no current flows. (a) True (b) False
  35. 35.True or false: “a single current path” is true of a series circuit. (a) True (b) False
  36. 36.🔋 Does an air conditioner give electricity or use electricity? (a) uses electricity (b) gives electricity
  37. 37.⚠️ Why must we never touch switches with wet hands? (a) it is just untidy (b) water carries current (c) it spoils the paint (d) water makes it cold
  38. 38.🔁 Is the circuit closed or open if the loop is complete? (a) closed (b) open
  39. 39.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a ceramic cup. Does the bulb glow? (a) No (b) Yes
  40. 40.🔦 A circuit has a used-up (dead) cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes

Answer key

  1. True
  2. a loudspeaker
  3. 230 V
  4. True
  5. an open circuit
  6. True
  7. a plastic ruler
  8. a plastic straw
  9. a slide switch
  10. True
  11. False
  12. False
  13. False
  14. works only while pressed
  15. open
  16. they keep glowing
  17. a steel coin
  18. the longer line
  19. True
  20. uses electricity
  21. Yes
  22. False
  23. not safe
  24. No
  25. parallel
  26. a mobile phone
  27. quick and clear for all
  28. safe
  29. copper
  30. − (negative)
  31. climb an electric pole
  32. True
  33. safe
  34. True
  35. True
  36. uses electricity
  37. water carries current
  38. closed
  39. No
  40. No

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