Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 746 · 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.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
2. 2.🔗 Series or parallel circuit: “a break stops every bulb”? (a) series (b) parallel
3. 3.⚠️ Is it safe to dry your hands first? (a) not safe (b) safe
4. 4.Which of these is true of a series circuit? (a) many paths for current (b) own switch for each bulb (c) a break stops every bulb (d) one out, the rest glow
5. 5.What does a slide switch do? (a) flips up or down (b) closes when tipped over (c) works only while pressed (d) slides side to side
6. 6.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) switch (b) LED (c) battery (d) voltmeter
7. 7.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) resistor (b) voltmeter (c) switch (d) diode
8. 8.⚠️ Who should be with you when you build a circuit? (a) nobody (b) a stranger online (c) a younger child (d) a trusted adult
9. 9.⚠️ About how many volts do home sockets in India supply? (a) 9 V (b) 1.5 V (c) 12 V (d) 230 V
10. 10.🔁 Is the circuit closed or open if all wires are joined? (a) open (b) closed
11. 11.💡 6 identical bulbs are in parallel and each bulb has its own switch on its path. 3 of the switches are OFF and the rest are ON. How many bulbs glow?
12. 12.True or false: “a single current path” is true of a series circuit. (a) False (b) True
13. 13.Which of these is safe? (a) fly a kite near wires (b) use a cable with cuts (c) use mains for a project (d) keep drinks far away
14. 14.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
15. 15.Which drawing is the symbol for an LED? (a) two or more cell symbols (b) triangle, bar and arrows (c) a dot where wires meet (d) triangle against a bar
16. 16.🔌 Why are electric wires covered in plastic? (a) to make them heavy (b) plastic is a conductor (c) plastic is an insulator (d) plastic makes current
17. 17.True or false: to poke things in a socket is safe. (a) False (b) True
18. 18.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) ammeter (b) capacitor (c) battery (d) junction
19. 19.Which drawing is the symbol for a diode? (a) a straight line (b) triangle, bar and arrows (c) a plain rectangle (d) triangle against a bar
20. 20.🔌 Is a plastic ruler a conductor or an insulator? (a) a conductor (b) an insulator
21. 21.True or false: to stay away from pylons is not safe. (a) True (b) False
22. 22.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) the longer line (c) the shorter line (d) both lines
23. 23.⚠️ Is it safe to stay away from pylons? (a) not safe (b) safe
24. 24.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
25. 25.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
26. 26.What does a tilt switch do? (a) stays where you flip it (b) closes when tipped over (c) flips up or down (d) springs back when let go
27. 27.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
28. 28.🔌 A gap of dry air between two wires acts as … (a) a switch that is ON (b) a conductor (c) an insulator (d) a cell
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 ON, B is OFF and C is ON. Does the bulb glow? (a) Yes (b) No
30. 30.⚡ What does a torch mainly change electricity into? (a) movement (b) heat (c) sound (d) light
31. 31.✏️ 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
32. 32.Which of these is not safe? (a) take cells out after use (b) stop if a part gets hot (c) stay away from pylons (d) touch a fallen wire
33. 33.⚠️ Is it safe to open a phone charger? (a) safe (b) not safe
34. 34.Which drawing is the symbol for a cell? (a) a plain rectangle (b) two equal parallel lines (c) two or more cell symbols (d) one tall, one short bar
35. 35.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) a single current path (c) each gets the full volts (d) a break stops every bulb
36. 36.🔌 Is a safety pin a conductor or an insulator? (a) a conductor (b) an insulator
37. 37.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) movement energy (b) sound energy (c) light energy (d) chemical energy
38. 38.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
39. 39.True or false: a steel coin is a conductor. (a) False (b) True
40. 40.True or false: a buzzer mainly makes sound. (a) True (b) False

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