Question

Determine the magnetic flux passing through the rectangular sheet of dimensions $0.2\text{m}\times 0.4\text{m}$ when it is held at right angles to a uniform magnetic field of strength $2.5\text{T}$.

• A. $0.2\text{weber}$
• B. $2\text{weber}$
• C. $0.4\text{weber}$
• D. $0.3\text{weber}$

Answer 1

The correct option is A $0.2\text{weber}$

Given: $l=0.2\text{m},b=0.4\text{m},B=2.5\text{T}$

Since, the magnetic flux is the field lines passing through the given cross section.

Then, $\varphi =BA$

So, $\varphi =2.5\times 0.2\times 0.4=0.2\text{weber}$

So, option (a) is the right answer.