Question

derive an expression for magnetic field intensity due to infinitely iong straight conductor carrying current

Answer 1

Answer:

Ampere's law equation

∮

B

→

.

dℓ

→

=μ∑i

Here

B

→

.

ℓ

→

=μ∑i

here

dμ

→

length element perpendicular to the plane of paper

∮

B

→

.

dℓ

→

=μ

o

∑i

B → magnetic field which is also perpendicular to plane of paper & align with length elements

∮

B

→

.

dℓ

→

=μ

o

∑i

B.∮dℓ=μ

o

i

B.2π=μ

o

i

B=

2πr

μ

o

i

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