Question

The value of intensity of magnetic field at a point due to a current carrying conductor depends

• A. On the value of current
• B. On a small part of length of conductor
• C. On angle between the line joining the given point to the mid point of small length and the distance between the small length of the point
• D. On all and the above

Answer 1

Answer: (D)

On all and the above
The Biot Savart law is used for computing the resultant magnetic field at position generated by a steady current I.

According to it
$B=\frac{{\mu }_{0}I}{4\pi }\int \frac{I\overrightarrow{dl}\times \overrightarrow{r}}{r^3}$.
So magnetic field at a distance r due to the current carrying conductor depends on:
i) the value of current
ii)small part of length of conductor
iii) and, the angle between the line joining the given point to the mid point of small length and the distance between the small length of the point.