Necessary Questions For Class 12 Physics Chapter 3 Present Electrical Energy Class 12 Important Questions
Nichrome and copper wires of identical size and similar radius are connected in sequence. It is clear that the net resistance is more within the series mixture. Therefore, extra heat shall be obtained in a sequence connection, as the heat produced is instantly proportional to the resistance within the circuit. An electric iron of resistance 20 ohms draws a current of 5 amperes. When an electrical present is handed via a high resistance wire, like nichrome wire, the resistance wire turns into extremely popular and produces warmth. How a lot vitality is consumed when a present of 5 amperes flows by way of the filament of a heater having resistance of a hundred ohms for two hours?
The potential distinction across the combination of the cells. Under the affect of subject \(\overrightarrow\), the free electrons start to drift in the different way \(\overrightarrow\) with a mean drift velocity vd. This is so because of the heat produced when a filament sort light bulb glows. The current that makes the heater component very popular, solely slightly warms the connecting wires leading to the heater as a result of the connecting wires have a low resistance. But the heater component has a really high resistance and so it will get very hot.
All the overhead lighting circuits are in parallel and related to the principle provide line, so when one bulb burns out, all the overhead lighting doesn’t go darkish. Each overhead gentle will have no much less than one change in sequence with the sunshine, so you probably can flip it on and off. A refrigerator has a compressor and a lightweight that goes on when the door opens. There is usually just one twine for the fridge to plug into the wall.
In that part, it was emphasised that the act of including extra resistors to a collection circuit ends in the rather anticipated results of having more overall resistance. Since there is simply one pathway by way of the circuit, each cost encounters the resistance of every device; so including more gadgets results in more total resistance. This elevated resistance serves to reduce the rate at which charge flows . If the terminals are open circuited, no current flows in coil A, and the current in coil B alone controls the motion of the transferring element. Coil B takes a place opposite the gap in the core , and the pointer signifies infinity on the size. When a resistance is related between the terminals, current flows in coil A, tending to maneuver the pointer clockwise.
Name the fabric which is used for making the filaments of an electrical bulb. What is meant by the heating effect what does cdfu mean in texting of current? Give two functions of the heating effect of current.