Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 658 · 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 is the odd one out? (a) a steel coin (b) a copper wire (c) a graphite rod (d) a glass marble
2. 2.Which of these is true of a series circuit? (a) a single current path (b) many paths for current (c) each gets the full volts (d) own switch for each bulb
3. 3.Which of these is safe? (a) use mains for a project (b) touch a switch when wet (c) stop if a part gets hot (d) climb an electric pole
4. 4.🔘 Which kind of switch works only while pressed? (a) a toggle switch (b) a tilt switch (c) a push button (d) a slide switch
5. 5.🔦 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 brass key. Does the bulb glow? (a) Yes (b) No
6. 6.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
7. 7.Which of these is true of a series circuit? (a) own switch for each bulb (b) each gets the full volts (c) bulbs share the voltage (d) one out, the rest glow
8. 8.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
9. 9.💡 A battery lights 3 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
10. 10.True or false: a night lamp mainly gives out light. (a) False (b) True
11. 11.Which drawing is the symbol for a resistor? (a) a circle with a cross (b) a line lifted at a gap (c) a plain rectangle (d) two equal parallel lines
12. 12.🔘 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 ON and C is ON. Does the bulb glow? (a) No (b) Yes
13. 13.True or false: a line lifted at a gap is the symbol for an LED. (a) True (b) False
14. 14.True or false: a mixer grinder mainly makes movement. (a) True (b) False
15. 15.⚠️ Is it safe to touch a switch when wet? (a) not safe (b) safe
16. 16.💡 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) dimmer (c) brighter
17. 17.True or false: a tilt switch springs back when let go. (a) True (b) False
18. 18.⚠️ Is it safe to fly a kite near wires? (a) not safe (b) safe
19. 19.True or false: to use a cable with cuts is not safe. (a) False (b) True
20. 20.Which drawing is the symbol for a junction? (a) two equal parallel lines (b) a small empty box (c) a dot where wires meet (d) a circle with M inside
21. 21.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
22. 22.🔁 Is the circuit closed or open if the loop is complete? (a) open (b) closed
23. 23.🔦 A circuit has a used-up (dead) cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
24. 24.⚠️ About how many volts do home sockets in India supply? (a) 230 V (b) 12 V (c) 1.5 V (d) 9 V
25. 25.Which of these mainly makes movement? (a) a street light (b) a tube light (c) a siren (d) a ceiling fan
26. 26.⚠️ Is it safe to use mains for a project? (a) not safe (b) safe
27. 27.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) sound energy (b) chemical energy (c) light energy (d) movement energy
28. 28.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
29. 29.🔍 Which is the odd one out? (a) a loudspeaker (b) a buzzer (c) a school bell (d) a street light
30. 30.🔍 Which is the odd one out? (a) a brass key (b) aluminium foil (c) a steel coin (d) a plastic ruler
31. 31.⚡ Which tiny particles drift along a metal wire to carry the current? (a) dust particles (b) electrons (c) water drops (d) photons
32. 32.🔗 Series or parallel circuit: “a break stops every bulb”? (a) parallel (b) series
33. 33.⚡ What do we call a flow of electric charge through a wire? (a) electric current (b) a magnet (c) sound (d) friction
34. 34.True or false: a push button works only while pressed. (a) True (b) False
35. 35.💡 6 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
36. 36.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
37. 37.True or false: a cotton thread is a conductor. (a) False (b) True
38. 38.✏️ In a circuit diagram, which part is drawn as a straight line? (a) junction (b) LED (c) wire (d) voltmeter
39. 39.🔍 Which is the odd one out? (a) an LED lamp (b) a traffic signal (c) a table fan (d) a torch
40. 40.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)

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