Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 240 · 40 questions

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.

1. 1.Which of these means the circuit is open? (a) the switch is ON (b) a wire has come loose (c) the loop is complete (d) all wires are joined
2. 2.💡 5 identical bulbs are in parallel and each bulb has its own switch on its path. 1 of the switches is OFF and the rest are ON. How many bulbs glow?
3. 3.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is ON, B is OFF, C is OFF and D is OFF. Does the bulb glow? (a) No (b) Yes
4. 4.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
5. 5.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
6. 6.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True
7. 7.True or false: a wooden stick is a conductor. (a) True (b) False
8. 8.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) False (b) True
9. 9.True or false: to use a cable with cuts is safe. (a) True (b) False
10. 10.Which of these means the circuit is open? (a) all wires are joined (b) the switch is ON (c) a cell is taken out (d) the loop is complete
11. 11.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
12. 12.💡 4 identical bulbs are joined in series with an 8 V battery (ideal wires). How many volts does each bulb get? =
13. 13.Which of these means the circuit is closed? (a) the bulb is unscrewed (b) a wire has come loose (c) the switch is OFF (d) all wires are joined
14. 14.✏️ In a circuit diagram, wires are usually drawn as … (a) dotted circles (b) little stars (c) wavy lines (d) straight lines
15. 15.🔋 Does a washing machine give electricity or use electricity? (a) gives electricity (b) uses electricity
16. 16.🔋 Does a computer give electricity or use electricity? (a) uses electricity (b) gives electricity
17. 17.What does a toggle switch do? (a) stays where you flip it (b) closes near a magnet (c) springs back when let go (d) works only while pressed
18. 18.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
19. 19.🔌 Most metals are good … (a) magnets only (b) batteries (c) conductors (d) insulators
20. 20.🔍 Which is the odd one out? (a) poke things in a socket (b) take cells out after use (c) use mains for a project (d) use a cable with cuts
21. 21.💡 A battery lights 2 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
22. 22.🔍 Which is the odd one out? (a) a buzzer (b) a table fan (c) an exhaust fan (d) a ceiling fan
23. 23.✏️ Why do engineers draw circuits with symbols? (a) to hide the circuit (b) to make it colourful (c) symbols are heavier (d) quick and clear for all
24. 24.True or false: triangle, bar and arrows is the symbol for a diode. (a) True (b) False
25. 25.🔌 Is a cotton thread a conductor or an insulator? (a) a conductor (b) an insulator
26. 26.🔘 A cell and a bulb are joined to 3 side-by-side paths with one switch on each path — A, B and C (parallel). A is ON, B is OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
27. 27.True or false: a line lifted at a gap is the symbol for a switch. (a) True (b) False
28. 28.🔍 Which is the odd one out? (a) aluminium foil (b) a woollen thread (c) a plastic ruler (d) a wooden stick
29. 29.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
30. 30.Which of these is an insulator? (a) a safety pin (b) aluminium foil (c) an iron nail (d) a plastic ruler
31. 31.True or false: a street light mainly makes movement. (a) True (b) False
32. 32.True or false: a safety pin is an insulator. (a) False (b) True
33. 33.💡 3 identical bulbs are joined in series with a 6 V battery (ideal wires). How many volts does each bulb get? =
34. 34.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
35. 35.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) True (b) False
36. 36.🔋 Does a power station give electricity or use electricity? (a) gives electricity (b) uses electricity
37. 37.🔌 Is a steel spoon a conductor or an insulator? (a) an insulator (b) a conductor
38. 38.🔘 Which kind of switch closes near a magnet? (a) a tilt switch (b) a slide switch (c) a push button (d) a reed switch
39. 39.🔍 Which is the odd one out? (a) a siren (b) a buzzer (c) a doorbell (d) a room heater
40. 40.✏️ In a circuit diagram, which part is drawn as triangle, bar and arrows? (a) diode (b) switch (c) battery (d) LED

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