Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 80 · 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.💡 A battery lights 4 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
2. 2.🔘 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 OFF and C is ON. Does the bulb glow? (a) Yes (b) No
3. 3.💡 A battery lights 4 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
4. 4.🔌 A gap of dry air between two wires acts as … (a) a switch that is ON (b) a cell (c) an insulator (d) a conductor
5. 5.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
6. 6.⚡ A fan changes electrical energy mainly into which kind of energy? (a) light energy (b) movement energy (c) sound energy (d) chemical energy
7. 7.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) wavy lines (c) dotted circles (d) straight lines
8. 8.🔍 Which is the odd one out? (a) a steel coin (b) a metal paper clip (c) a steel spoon (d) a dry cork
9. 9.Which of these is a conductor? (a) a cotton thread (b) a ceramic cup (c) a copper wire (d) a rubber eraser
10. 10.What does a push button do? (a) works only while pressed (b) closes when tipped over (c) slides side to side (d) stays where you flip it
11. 11.🔘 When a switch is ON, the circuit is … (a) closed (b) cut (c) broken (d) open
12. 12.True or false: a small empty box is the symbol for a resistor. (a) False (b) True
13. 13.True or false: a reed switch works only while pressed. (a) True (b) False
14. 14.✏️ In a cell symbol, which line is the + terminal? (a) the longer line (b) the shorter line (c) both lines (d) neither line
15. 15.🔁 Is the circuit closed or open if all wires are joined? (a) open (b) closed
16. 16.Which of these mainly gives out heat? (a) a night lamp (b) an electric iron (c) an electric toy car (d) an exhaust fan
17. 17.🔍 Which is the odd one out? (a) a rubber band (b) a brass key (c) a graphite rod (d) a safety pin
18. 18.True or false: to touch a switch when wet is not safe. (a) False (b) True
19. 19.🔌 Is a dry cork a conductor or an insulator? (a) a conductor (b) an insulator
20. 20.🔌 Which part of a screwdriver should an electrician hold? (a) the bare end (b) the metal tip (c) the steel shaft (d) the plastic handle
21. 21.🔍 Which is the odd one out? (a) a siren (b) a school bell (c) a doorbell (d) an LED lamp
22. 22.True or false: to build with an adult near is safe. (a) False (b) True
23. 23.🔗 Series or parallel circuit: “each gets the full volts”? (a) series (b) parallel
24. 24.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) True (b) False
25. 25.What does a push button do? (a) stays where you flip it (b) slides side to side (c) springs back when let go (d) flips up or down
26. 26.🔋 Does a battery give electricity or use electricity? (a) gives electricity (b) uses electricity
27. 27.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
28. 28.True or false: to use a cable with cuts is safe. (a) False (b) True
29. 29.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) by Wi-Fi (c) in parallel (d) in series
30. 30.Which of these is a conductor? (a) a dry cork (b) a rubber eraser (c) a cotton thread (d) a steel spoon
31. 31.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a graphite rod across the gap. Does the bulb glow? (a) No (b) Yes
32. 32.💡 2 identical bulbs are joined in series with an 8 V battery (ideal wires). How many volts does each bulb get? =
33. 33.True or false: on a cell, “the flat end” means the + (positive) end. (a) False (b) True
34. 34.⚡ What do we call a flow of electric charge through a wire? (a) sound (b) friction (c) a magnet (d) electric current
35. 35.Which of these means the circuit is open? (a) a wire has come loose (b) all wires are joined (c) the switch is ON (d) the loop is complete
36. 36.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are OFF (b) only when both are ON (c) when either is ON (d) never
37. 37.💡 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) the same (c) brighter
38. 38.What does a reed switch do? (a) stays where you flip it (b) works only while pressed (c) closes near a magnet (d) flips up or down
39. 39.True or false: if the switch is OFF, the circuit is closed and current flows. (a) False (b) True
40. 40.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True

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