- #1

Gourab_chill

- 55

- 3

- Homework Statement
- I've put question below.

- Relevant Equations
- B=µNI; N=no of turns for unit length of solenoid

Here, the correct options are A,D.

Solution:

I got A as answer as ∫ B.dl=µI. But, the answer to the question says that it is a solenoid and therefore Bx=0 for point P. Here I'm a bit confused. I know this system resembles a solenoid in some ways, then By must have some finite value, but ampere's law says there should be no magnetic field in the pipe or it's magnitude is zero. Where am I mistaking?