Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 994 · 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.True or false: an exhaust fan mainly makes sound. (a) False (b) True
2. 2.True or false: on a cell, “the flat end” means the + (positive) end. (a) False (b) True
3. 3.True or false: a water heater mainly gives out heat. (a) True (b) False
4. 4.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) cell (b) voltmeter (c) battery (d) motor
5. 5.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
6. 6.Which of these is true of a series circuit? (a) own switch for each bulb (b) one out, the rest glow (c) used in house wiring (d) one bulb out, all go out
7. 7.💡 2 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. Does bulb 1 glow? (a) No (b) Yes
8. 8.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) wavy lines (c) straight lines (d) dotted circles
9. 9.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
10. 10.True or false: to use a cable with cuts is safe. (a) False (b) True
11. 11.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
12. 12.Which of these is safe? (a) touch a fallen wire (b) build with an adult near (c) open a phone charger (d) fly a kite near wires
13. 13.🔋 How many 2 V cells must be joined in series to give 4 V?
14. 14.Which of these means the circuit is closed? (a) a wire has come loose (b) the bulb is unscrewed (c) a cell is taken out (d) all wires are joined
15. 15.⚠️ About how many volts do home sockets in India supply? (a) 9 V (b) 12 V (c) 230 V (d) 1.5 V
16. 16.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a fuse or MCB (b) a long wire (c) a plug top (d) a bulb
17. 17.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they keep glowing (c) they get dimmer (d) they all go out
18. 18.True or false: triangle against a bar is the symbol for an ammeter. (a) True (b) False
19. 19.🔌 Is a steel spoon a conductor or an insulator? (a) a conductor (b) an insulator
20. 20.Which of these uses electricity? (a) a power station (b) a generator (c) a bicycle dynamo (d) a mobile phone
21. 21.Which of these is true of a series circuit? (a) many paths for current (b) own switch for each bulb (c) bulbs share the voltage (d) used in house wiring
22. 22.True or false: a safety pin is a conductor. (a) False (b) True
23. 23.Which of these is not safe? (a) take cells out after use (b) use mains for a project (c) build with an adult near (d) stop if a part gets hot
24. 24.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
25. 25.True or false: a steel coin is an insulator. (a) False (b) True
26. 26.🔁 Is the circuit closed or open if a wire is cut? (a) open (b) closed
27. 27.Which of these gives us electricity? (a) a television (b) a solar panel (c) a washing machine (d) a computer
28. 28.Which of these is not safe? (a) stay away from pylons (b) fly kites in open fields (c) stop if a part gets hot (d) touch a fallen wire
29. 29.🔘 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 ON. Does the bulb glow? (a) No (b) Yes
30. 30.💡 4 identical bulbs are joined in series with a 4 V battery (ideal wires). How many volts does each bulb get? =
31. 31.🔦 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
32. 32.🔌 Is a ceramic cup a conductor or an insulator? (a) a conductor (b) an insulator
33. 33.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) each gets full voltage (c) so all go off together (d) to save copper only
34. 34.True or false: a line lifted at a gap is the symbol for a cell. (a) False (b) True
35. 35.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
36. 36.💡 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 2 is taken out of its holder. How many bulbs glow?
37. 37.⚠️ Is it safe to poke things in a socket? (a) not safe (b) safe
38. 38.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
39. 39.True or false: “each gets the full volts” is true of a parallel circuit. (a) True (b) False
40. 40.🔘 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 OFF and C is ON. Does the bulb glow? (a) No (b) Yes

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