First slide

Magnetic field due to a moving charge

Question

The magnitude of magnetic field at a point having perpendicular distance 50 mm from a long straight conducting wire carrying a current of 3A is

Easy

A

0.12 G
B

1.2 G
C

12 G
D

0.012 G

Solution

$B = \frac{μ_{0} i}{2 π r} = \frac{2 \times 10^{- 7} \times 3}{50 \times 10^{- 3}} T = 0.12 \times 10^{- 4} T = 0.12 G a u s s$

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