Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 933 · 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 tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel spoon across the gap. Does the bulb glow? (a) Yes (b) No
2. 2.Which drawing is the symbol for an LED? (a) a circle with V inside (b) triangle, bar and arrows (c) a dot where wires meet (d) a small empty box
3. 3.⚡ What does a traffic signal mainly change electricity into? (a) movement (b) heat (c) light (d) sound
4. 4.Which of these is not safe? (a) touch a switch when wet (b) build with an adult near (c) take cells out after use (d) fly kites in open fields
5. 5.✏️ Why do engineers draw circuits with symbols? (a) to hide the circuit (b) to make it colourful (c) symbols are heavier (d) quick and clear for all
6. 6.Which of these is true of a series circuit? (a) each gets the full volts (b) one out, the rest glow (c) used in house wiring (d) bulbs share the voltage
7. 7.🔌 Is a rubber band a conductor or an insulator? (a) a conductor (b) an insulator
8. 8.✏️ In a circuit diagram, wires are usually drawn as … (a) wavy lines (b) straight lines (c) little stars (d) dotted circles
9. 9.True or false: to build with an adult near is not safe. (a) False (b) True
10. 10.True or false: to take cells out after use is safe. (a) True (b) False
11. 11.True or false: a siren mainly makes sound. (a) False (b) True
12. 12.💡 5 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
13. 13.🔌 Is a graphite rod a conductor or an insulator? (a) an insulator (b) a conductor
14. 14.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) True (b) False
15. 15.🔋 3 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)? =
16. 16.💡 Why is house wiring done in parallel? (a) to save copper only (b) each gets full voltage (c) to make bulbs dim (d) so all go off together
17. 17.True or false: a torch mainly makes movement. (a) True (b) False
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 OFF, B is OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
19. 19.💡 3 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. Bulb 3 is taken out of its holder. Does bulb 2 glow? (a) No (b) Yes
20. 20.🔋 Identical cells side by side (in parallel) give … (a) half the voltage (b) the same voltage (c) double the voltage (d) no voltage
21. 21.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) by Wi-Fi (c) in series (d) not joined
22. 22.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
23. 23.💡 6 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
24. 24.Which of these mainly gives out light? (a) an exhaust fan (b) a torch (c) a mixer grinder (d) a buzzer
25. 25.🔦 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 aluminium foil. Does the bulb glow? (a) Yes (b) No
26. 26.Which of these mainly gives out heat? (a) a mixer grinder (b) a school bell (c) a room heater (d) a night lamp
27. 27.True or false: a table fan mainly makes movement. (a) False (b) True
28. 28.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
29. 29.🔋 A 12 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
30. 30.⚠️ About how many volts do home sockets in India supply? (a) 230 V (b) 1.5 V (c) 12 V (d) 9 V
31. 31.💡 3 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 2 and 3 are taken out of their holders. How many bulbs glow?
32. 32.True or false: a night lamp mainly gives out light. (a) True (b) False
33. 33.Which of these means the circuit is open? (a) the switch is ON (b) a cell is taken out (c) the loop is complete (d) all wires are joined
34. 34.🔌 Is a glass marble a conductor or an insulator? (a) a conductor (b) an insulator
35. 35.True or false: a toggle switch slides side to side. (a) True (b) False
36. 36.Which of these is not safe? (a) stop if a part gets hot (b) stay away from pylons (c) build with an adult near (d) open a phone charger
37. 37.Which of these is safe? (a) use small battery cells (b) throw cells in a fire (c) use mains for a project (d) poke things in a socket
38. 38.🔘 Which kind of switch springs back when let go? (a) a reed switch (b) a slide switch (c) a push button (d) a tilt switch
39. 39.True or false: many long-short pairs is the symbol for a battery. (a) True (b) False
40. 40.⚡ What does a tube light mainly change electricity into? (a) heat (b) movement (c) light (d) sound

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