A current `i` flows along the length of an infinitely long, straight, thin-walled pipe. Then,
(a) the magnetic field at all points inside the pipe is the same, but not zero
(b) the magnetic field at any point inside the pipe is zero
(c) the magnetic field is zero only on the axis of the pipe
(d) the magnetic field is different at different points inside the pipe

Explanation

To solve the problem of determining the magnetic field inside an infinitely long, straight, thin-walled pipe carrying a current \( i \), we can use Ampere's Circuital Law. Here’s a step-by-step solution:

### Step 1: Understand the Configuration
We have an infinitely long, straight, thin-walled pipe with a current \( i \) flowing through it. The pipe can be visualized as a hollow cylinder.

**Hint:** Visualize the pipe as a hollow cylinder with current flowing along its length.

### Step 2: Apply Ampere's Circuital Law
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