Rankers Physics

Ampere's Circuital Law: Practice Problem & Solution

If a long hollow copper pipe carries a direct current, the magnetic field associated with the current will be :
only inside the pipe
only outside the pipe
both inside and outside the pipe
neither inside nor outside the pipe

Short Solution (Best for NEET):

To solve this problem, we apply the core principles of Ampere's Circuital Law. Understanding the underlying formula is key to arriving at the correct answer below:

Inside the pipe current enclosed will be zero so magnetic field will also be zero. Outside the pipe there will be net Magnetic field

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