Question

magnetic field due to a current carrying conductor. give answers in at least 4 points... plz fast....

Answer 1

Magnetic field is generally interpreted as a region where the force of magnetism acts. This force of magnetism is generally produced as a result of moving charge or some magnetic material. The origins of this interpretation dates back in 19thcentury. During the early years of 19th century, a scientist named H. C. Oersted discovered that a current carrying conductor produces magnetic effect around it. Although science and technology were not as developed as they are today, based on observations, it was already known that the effect of lightning striking a ship caused the malfunctioning of compass needles, disrupting the navigation system. People back then knew that lightning was a form of electricity and also the fact that the working of a compass is based on the earth’s magnetic field. This suggested a relationship between the two, the moving electric charge (current) and the magnetic field.

Answer 2

We know that a moving charge is equivalent to a current, since, current is defined as the rate of flow of charge. When there is a current, there is a magnetic field according to the Biot Savart’s Law. Also, magnetic field at a point is directly proportional to current flowing through the conductor and inversely proportional to the square of the magnitude of distance between them. As the amount of current flowing through the conductor increases,strength of magnetic field increases. Also,with increase in distance between the current carrying conductor and the point, the magnetic field decreases.
In case of stationary charges, there is not current in the system so no magnetic field is observed.


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