Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 545 · 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) to hide the circuit (b) symbols are heavier (c) to make it colourful (d) quick and clear for all
2. 2.True or false: aluminium foil is a conductor. (a) False (b) True
3. 3.🔍 Which is the odd one out? (a) build with an adult near (b) stop if a part gets hot (c) use small battery cells (d) open a phone charger
4. 4.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) both lines (c) the longer line (d) the shorter line
5. 5.What does a push button do? (a) flips up or down (b) stays where you flip it (c) springs back when let go (d) closes when tipped over
6. 6.True or false: to dry your hands first is safe. (a) False (b) True
7. 7.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
8. 8.Which of these uses electricity? (a) a cell (b) a bicycle dynamo (c) a refrigerator (d) a solar panel
9. 9.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) only one (b) none (c) both of them (d) it does not matter
10. 10.True or false: a dot where wires meet is the symbol for a motor. (a) False (b) True
11. 11.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) True (b) False
12. 12.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) never (b) only when both are OFF (c) only when both are ON (d) when either is ON
13. 13.💡 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
14. 14.True or false: a torch mainly gives out light. (a) False (b) True
15. 15.🔋 What is a battery? (a) a kind of bulb (b) one single wire (c) a switch with a lid (d) two or more cells joined
16. 16.Which of these means the circuit is closed? (a) a cell is taken out (b) the loop is complete (c) a wire has come loose (d) a wire is cut
17. 17.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
18. 18.Which of these uses electricity? (a) a power station (b) a battery (c) a washing machine (d) a solar panel
19. 19.✏️ In a circuit diagram, which part is drawn as a dot where wires meet? (a) wire (b) junction (c) ammeter (d) bulb
20. 20.🔦 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 brass key. Does the bulb glow? (a) Yes (b) No
21. 21.🔋 5 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
22. 22.Which of these is safe? (a) use small battery cells (b) use mains for a project (c) throw cells in a fire (d) use a cable with cuts
23. 23.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
24. 24.🔁 What must there be for a current to flow? (a) a broken path (b) a complete loop (c) one loose end (d) a plastic gap
25. 25.Which of these means the circuit is open? (a) the switch is ON (b) the bulb is unscrewed (c) the loop is complete (d) all wires are joined
26. 26.🔋 What should you do with used-up cells? (a) throw them in a fire (b) cut them open (c) bury them in soil (d) give them for recycling
27. 27.Which of these mainly gives out heat? (a) an exhaust fan (b) a traffic signal (c) a water heater (d) a table fan
28. 28.💡 6 identical bulbs are in parallel and each bulb has its own switch on its path. 5 of the switches are OFF and the rest are ON. How many bulbs glow?
29. 29.True or false: if a cell is taken out, the circuit is open and no current flows. (a) False (b) True
30. 30.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
31. 31.True or false: a night lamp mainly makes sound. (a) False (b) True
32. 32.Which of these is not safe? (a) stay away from pylons (b) dry your hands first (c) build with an adult near (d) poke things in a socket
33. 33.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) own switch for each bulb (c) a break stops every bulb (d) a single current path
34. 34.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in series (b) by Wi-Fi (c) in parallel (d) not joined
35. 35.What does a tilt switch do? (a) stays where you flip it (b) closes when tipped over (c) closes near a magnet (d) works only while pressed
36. 36.⚡ What do we call a flow of electric charge through a wire? (a) friction (b) electric current (c) sound (d) a magnet
37. 37.🔗 Series or parallel circuit: “one out, the rest glow”? (a) parallel (b) series
38. 38.Which drawing is the symbol for a resistor? (a) triangle, bar and arrows (b) a plain rectangle (c) a long and a short line (d) a circle with an X in it
39. 39.True or false: “used in house wiring” is true of a parallel circuit. (a) True (b) False
40. 40.🔌 Which metal is used for most electric wires at home? (a) plastic (b) rubber (c) copper (d) glass

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