Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 328 · 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 is not safe? (a) use a cable with cuts (b) fly kites in open fields (c) keep drinks far away (d) dry your hands first
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 OFF. Does the bulb glow? (a) No (b) Yes
3. 3.🔌 Is a cotton thread a conductor or an insulator? (a) an insulator (b) a conductor
4. 4.True or false: a rice cooker mainly gives out heat. (a) False (b) True
5. 5.Which of these is safe? (a) use mains for a project (b) climb an electric pole (c) take cells out after use (d) fly a kite near wires
6. 6.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) to save copper only (c) each gets full voltage (d) so all go off together
7. 7.⚠️ Which power source should children use for electronics projects? (a) a mains extension board (b) a wall socket (c) an inverter socket (d) a small battery pack
8. 8.🔌 Which part of a screwdriver should an electrician hold? (a) the bare end (b) the steel shaft (c) the plastic handle (d) the metal tip
9. 9.Which of these is true of a series circuit? (a) one out, the rest glow (b) many paths for current (c) each gets the full volts (d) a break stops every bulb
10. 10.Which of these uses electricity? (a) a battery (b) a computer (c) a bicycle dynamo (d) a wind turbine
11. 11.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
12. 12.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
13. 13.Which of these gives us electricity? (a) a television (b) a battery (c) a refrigerator (d) a water pump
14. 14.Which of these is an insulator? (a) a rubber band (b) a metal paper clip (c) a brass key (d) a copper wire
15. 15.Which of these is true of a parallel circuit? (a) used in house wiring (b) a single current path (c) a break stops every bulb (d) one bulb out, all go out
16. 16.True or false: a tilt switch flips up or down. (a) False (b) True
17. 17.🔍 Which is the odd one out? (a) build with an adult near (b) use small battery cells (c) open a phone charger (d) stay away from pylons
18. 18.💡 4 identical bulbs are joined in series with a 16 V battery (ideal wires). How many volts does each bulb get? =
19. 19.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) not joined (c) by Wi-Fi (d) in series
20. 20.🔍 Which is the odd one out? (a) a table fan (b) a tube light (c) a torch (d) a night lamp
21. 21.🔌 Is a metal paper clip a conductor or an insulator? (a) an insulator (b) a conductor
22. 22.⚡ What do we call a flow of electric charge through a wire? (a) friction (b) a magnet (c) electric current (d) sound
23. 23.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) parallel (b) series
24. 24.Which drawing is the symbol for a battery? (a) triangle against a bar (b) a straight line (c) a circle with a cross (d) many long-short pairs
25. 25.Which of these uses electricity? (a) a washing machine (b) a bicycle dynamo (c) a solar panel (d) a battery
26. 26.Which drawing is the symbol for a cell? (a) one tall, one short bar (b) a circle with an X in it (c) a plain rectangle (d) a circle with V inside
27. 27.🔋 Does a generator give electricity or use electricity? (a) gives electricity (b) uses electricity
28. 28.True or false: “each gets the full volts” is true of a parallel circuit. (a) True (b) False
29. 29.✏️ Why do engineers draw circuits with symbols? (a) to make it colourful (b) to hide the circuit (c) symbols are heavier (d) quick and clear for all
30. 30.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
31. 31.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) parallel (b) series
32. 32.Which drawing is the symbol for a cell? (a) a long and a short line (b) triangle, bar and arrows (c) triangle against a bar (d) many long-short pairs
33. 33.True or false: on a cell, “the flat end” means the + (positive) end. (a) False (b) True
34. 34.🔦 A circuit has a used-up (dead) cell, a good bulb and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by an iron nail. Does the bulb glow? (a) Yes (b) No
35. 35.Which of these means the circuit is open? (a) the loop is complete (b) the switch is ON (c) the bulb is unscrewed (d) all wires are joined
36. 36.💡 2 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. How many bulbs glow?
37. 37.🔘 Which kind of switch flips up or down? (a) a push button (b) a tilt switch (c) a slide switch (d) a toggle switch
38. 38.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 5 is taken out of its holder. How many bulbs glow?
39. 39.Which of these gives us electricity? (a) a washing machine (b) a cell (c) an air conditioner (d) a water pump
40. 40.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True

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