Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 630 · 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.✏️ Why do engineers draw circuits with symbols? (a) quick and clear for all (b) symbols are heavier (c) to make it colourful (d) to hide the circuit
2. 2.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. A gap in one wire is bridged by a cotton thread. Does the bulb glow? (a) Yes (b) No
3. 3.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) bulb (b) junction (c) cell (d) switch
4. 4.Which of these mainly gives out heat? (a) an electric toy car (b) a street light (c) an electric drill (d) an electric kettle
5. 5.Which of these is safe? (a) use small battery cells (b) touch a switch when wet (c) fly a kite near wires (d) climb an electric pole
6. 6.🔘 Two switches are in series. When does the bulb glow? (a) when both are OFF (b) when either is ON (c) when both are ON (d) never
7. 7.🔋 Does a generator give electricity or use electricity? (a) uses electricity (b) gives electricity
8. 8.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a ceramic cup across the gap. Does the bulb glow? (a) No (b) Yes
9. 9.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a plastic straw across the gap. Does the bulb glow? (a) No (b) Yes
10. 10.🔍 Which is the odd one out? (a) a dry cork (b) an iron nail (c) a copper wire (d) aluminium foil
11. 11.True or false: a plastic ruler is a conductor. (a) True (b) False
12. 12.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) neither line (c) the longer line (d) both lines
13. 13.🔋 How many 2 V cells must be joined in series to give 12 V?
14. 14.True or false: a toggle switch slides side to side. (a) False (b) True
15. 15.💡 4 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
16. 16.🔗 Series or parallel circuit: “many paths for current”? (a) parallel (b) series
17. 17.✏️ In a circuit diagram, which part is drawn as two equal parallel lines? (a) cell (b) voltmeter (c) LED (d) capacitor
18. 18.🔘 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 ON, B is ON and C is ON. Does the bulb glow? (a) No (b) Yes
19. 19.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. A gap in one wire is bridged by a steel coin. Does the bulb glow? (a) Yes (b) No
20. 20.🔌 Which part of a screwdriver should an electrician hold? (a) the metal tip (b) the plastic handle (c) the bare end (d) the steel shaft
21. 21.🔋 How many volts does one ordinary torch cell give? (a) 230 V (b) 15 V (c) 1.5 V (d) 0.5 V
22. 22.What does a toggle switch do? (a) springs back when let go (b) closes near a magnet (c) closes when tipped over (d) stays where you flip it
23. 23.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is OFF, B is ON and C is OFF. Does the bulb glow? (a) Yes (b) No
24. 24.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) in series (c) by Wi-Fi (d) not joined
25. 25.✏️ In a circuit diagram, wires are usually drawn as … (a) wavy lines (b) dotted circles (c) little stars (d) straight lines
26. 26.⚡ What does a street light mainly change electricity into? (a) sound (b) light (c) heat (d) movement
27. 27.🔌 Is an iron nail a conductor or an insulator? (a) a conductor (b) an insulator
28. 28.True or false: a toggle switch flips up or down. (a) True (b) False
29. 29.🔍 Which is the odd one out? (a) a wooden stick (b) a ceramic cup (c) a steel coin (d) a cotton thread
30. 30.Which drawing is the symbol for an ammeter? (a) two or more cell symbols (b) a circle with M inside (c) a circle with A inside (d) many long-short pairs
31. 31.🔌 Which metal is used for most electric wires at home? (a) plastic (b) rubber (c) copper (d) glass
32. 32.🔁 What must there be for a current to flow? (a) one loose end (b) a complete loop (c) a broken path (d) a plastic gap
33. 33.Which of these is an insulator? (a) a paper strip (b) a brass key (c) aluminium foil (d) an iron nail
34. 34.🔁 Is the circuit closed or open if the switch is ON? (a) closed (b) open
35. 35.True or false: a loudspeaker mainly gives out heat. (a) True (b) False
36. 36.Which of these is true of a series circuit? (a) one out, the rest glow (b) each gets the full volts (c) used in house wiring (d) a single current path
37. 37.What does a push button do? (a) closes near a magnet (b) flips up or down (c) works only while pressed (d) closes when tipped over
38. 38.🔦 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 plastic straw. Does the bulb glow? (a) No (b) Yes
39. 39.⚡ What does a mixer grinder mainly change electricity into? (a) heat (b) movement (c) sound (d) light
40. 40.🔁 Is the circuit closed or open if all wires are joined? (a) closed (b) open

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