Ampere�s Law � If a circular loop is drawn around a current carrying conductor; it will erect a magnetic field � B � around it, then to free space� ?B/� dl = I Where, ? is the integral representation of the total area of magnetic field �B� of the circular loop of current carrying conductor. In case of Straight Wire: Since, �B� (the red dots) is uniform, it behave as a constant value (as amount of current is same in conductor). Now �dl� is a small part of the total circular loop, for which we have to find the value of �B� at that point. Now, as �dl� is small area of the circle, or we can say it�s a derivative of the total area bounded by the circular loop (circumference of the circular loop), so, if we take an integral of �dl� we can have the total area bounded by the circular loop which is 2pr. In case of Solenoid: Here, the solenoid has number of turns �N� and is having a
Comments
Post a Comment