CUET Preparation Today
A long straight wire of a circular cross-section of radius 'a' is carrying steady current I. The current I is uniformly distributed across this cross-section. What will be the magnetic field in the region $r < a$ and $r > a$? |
$B∝r (r< a)$ and $B ∝ r^{-1} (r > a)$ $B∝r (r> a)$ and $B ∝ r^{-1} (r < a)$ $B=0(r< a)$ and $B ∝ r^{-1} (r > a)$ $B∝r (r< a)$ and $B =0 (r > a)$ |
$B∝r (r< a)$ and $B ∝ r^{-1} (r > a)$ |
The correct answer is Option (1) → $B∝r (r< a)$ and $B ∝ r^{-1} (r > a)$ |
