1 A current flows through an infinitely long straight wire. The magnetic field produced at a point 1 m away from it is

Question

1 A current flows through an infinitely long straight wire. The magnetic field produced at a point 1 m away from it is (A)  2 × 10-3 T  (B)  (2/10) T  (C)  2 × 10-7 T  (D)  2π × 10-6 T

Tardigrade Admin · Accepted Answer

Magnetic field produced by straight current carrying conductor at a distance

r

is

B = \frac{μ _{0}}{4 π} \cdot \frac{2 I}{r}

Here,

I = 1 A r = 1 m, B = ?

Substituting these values, we get

B = 1 0^{- 7} \times \frac{2 \times 1}{1}

= 2 \times 1 0^{- 7} T

Q. $1 A$ current flows through an infinitely long straight wire. The magnetic field produced at a point $1 m$ away from it is

$2 \times 1 0^{- 3} T$

$\frac{2}{10} T$

$2 \times 1 0^{- 7} T$

$2 π \times 1 0^{- 6} T$

Magnetic field produced by straight current carrying conductor at a distance $r$ is $B = \frac{μ _{0}}{4 π} \cdot \frac{2 I}{r}$
Here, $I = 1 A r = 1 m, B = ?$
Substituting these values, we get
$B = 1 0^{- 7} \times \frac{2 \times 1}{1}$
$= 2 \times 1 0^{- 7} T$

Q. 1A current flows through an infinitely long straight wire. The magnetic field produced at a point 1m away from it is

2×10−3T

102​T

2×10−7T

2π×10−6T