Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 623 · 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.💡 5 identical bulbs are joined in parallel (each on its own side-by-side path) with a battery and a closed switch on the main wire. Bulbs 4 and 5 are taken out of their holders. How many bulbs glow?
2. 2.🔘 Which kind of switch works only while pressed? (a) a slide switch (b) a reed switch (c) a toggle switch (d) a push button
3. 3.True or false: a mixer grinder mainly makes movement. (a) True (b) False
4. 4.Which of these means the circuit is closed? (a) the bulb is unscrewed (b) all wires are joined (c) a cell is taken out (d) the switch is OFF
5. 5.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) one out, the rest glow (c) bulbs share the voltage (d) one bulb out, all go out
6. 6.Which of these mainly makes movement? (a) a loudspeaker (b) a buzzer (c) a table fan (d) a street light
7. 7.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the filament (b) the glass (c) the base (d) the switch
8. 8.💡 2 identical bulbs are joined in series with an 8 V battery (ideal wires). How many volts does each bulb get? =
9. 9.True or false: a toggle switch flips up or down. (a) True (b) False
10. 10.⚠️ Is it safe to climb an electric pole? (a) safe (b) not safe
11. 11.🔌 Is a cotton thread a conductor or an insulator? (a) an insulator (b) a conductor
12. 12.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 3 is taken out of its holder. How many bulbs glow?
13. 13.🔍 Which is the odd one out? (a) throw cells in a fire (b) fly a kite near wires (c) use mains for a project (d) take cells out after use
14. 14.Which drawing is the symbol for an ammeter? (a) triangle against a bar (b) two or more cell symbols (c) many long-short pairs (d) a circle with A inside
15. 15.⚠️ Is it safe to throw cells in a fire? (a) not safe (b) safe
16. 16.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a cotton thread across the gap. Does the bulb glow? (a) Yes (b) No
17. 17.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
18. 18.True or false: to take cells out after use is safe. (a) True (b) False
19. 19.Which of these mainly gives out heat? (a) a rice cooker (b) a street light (c) a torch (d) a night lamp
20. 20.🔘 Which kind of switch closes near a magnet? (a) a toggle switch (b) a reed switch (c) a tilt switch (d) a slide switch
21. 21.🔦 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
22. 22.Which of these mainly gives out light? (a) a mixer grinder (b) a toaster (c) a school bell (d) a street light
23. 23.🔍 Which is the odd one out? (a) a buzzer (b) an electric kettle (c) a room heater (d) a toaster
24. 24.Which of these is true of a parallel circuit? (a) used in house wiring (b) one bulb out, all go out (c) bulbs share the voltage (d) a single current path
25. 25.Which of these is a conductor? (a) a plastic straw (b) a woollen thread (c) a wooden stick (d) an iron nail
26. 26.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
27. 27.🔗 Series or parallel circuit: “own switch for each bulb”? (a) parallel (b) series
28. 28.🔗 Series or parallel circuit: “each gets the full volts”? (a) parallel (b) series
29. 29.⚠️ Which power source should children use for electronics projects? (a) an inverter socket (b) a wall socket (c) a mains extension board (d) a small battery pack
30. 30.Which of these gives us electricity? (a) a computer (b) a television (c) a washing machine (d) a battery
31. 31.True or false: a mixer grinder mainly gives out light. (a) True (b) False
32. 32.🔍 Which is the odd one out? (a) open a phone charger (b) keep drinks far away (c) dry your hands first (d) build with an adult near
33. 33.✏️ Why do engineers draw circuits with symbols? (a) quick and clear for all (b) to make it colourful (c) symbols are heavier (d) to hide the circuit
34. 34.🔋 4 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
35. 35.🔍 Which is the odd one out? (a) an iron nail (b) a plastic straw (c) a cotton thread (d) a rubber band
36. 36.🔦 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 rubber eraser. Does the bulb glow? (a) Yes (b) No
37. 37.🔋 2 identical 2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
38. 38.Which of these is not safe? (a) build with an adult near (b) use small battery cells (c) climb an electric pole (d) take cells out after use
39. 39.True or false: a woollen thread is a conductor. (a) True (b) False
40. 40.🔘 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) Yes (b) No

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