Astraight wire of length 0.53 m carries a conventional current of 0.2 amperes. what is the magnitude of the magnetic field made by the current at a location 2.0 cm from the wire? use both the exact formula and the approximate formula to calculate the field. (a) result using exact formula

Explanation:

It is given that,

Length of wire, l = 0.53 m

Current, I = 0.2 A

(1.) Approximate formula:

We need to find the magnitude of the magnetic field made by the current at a location 2.0 cm from the wire, r = 2 cm = 0.02 m

The formula for magnetic field at some distance from the wire is given by :

B = 0.000002 T

(2) Exact formula:

B = 0.00000199 T

or

B = 0.000002 T

Hence, this is the required solution.