TS EAMCET · Physics · Magnetic Effects of Current
A current i flows in an infinitely long, straight and thin walled pipe, then
- A the magnetic field at all the points inside the pipe is 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
Answer & Solution
Correct Answer
(B) the magnetic field at any point inside the pipe is zero
Step-by-step Solution
Detailed explanation
From the ampere's law \[ \oint \mathrm{B} \cdot \mathrm{dl}=\mu_0 \mathrm{i} \] The current enclosed inside it is zero, the magnetic field will be equal to zero.
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