Question

1. Find the magnetic field induction ( in magnitude
and direction) at a point due to current flowing
in a long straight conductor. Show the sketch
of magnetic field produced.
​

Answer 1

Answer:

Length of CD is very long.

Current flowing is I.

Here magnetic field (B) at 0 is due to ABC and CD section.

B=field due to half circular section +long wire C to D outward from the plane of paper.

B=

∣

∣

∣

∣

∣

4R

μ

0

I

+

4πR

μ

0

I

(sin90−sin0)

∣

∣

∣

∣

∣

=

4R

μ

0

I

+

4πR

μ

0

I

out of the paper.