Question

14. The magnitude of the magnetic field of a long, straight wire carrying a current of 1 A at distance of 1 m from it is​

Answer 1

Answer:

Given:

Current : 1A

Distance : 1m

Explanation:

Magnetic field due to a long wire

B = μ x 2I / 4π r where I is current and μ / 4π = 10⁻⁷ , r is distance from the wire

Putting the values

B = 10⁻⁷ x 2 x 1 / 1

= 2 x 10⁻⁷ T .

earth’s magnetic field = 45 x 10⁻⁶ T = 450 x 10⁻⁷

So the magnetic field is 225 times less strong than earth’s magnetic field .