Q90 / 120 · VITEEE 2013 · Physics
The dimensional formula of magnetic flux is
- A$\left[\mathrm{M}^{1} \mathrm{~L}^{2} \mathrm{~T}^{-1} \mathrm{~A}^{-2}\right]$
- Correct answerB$\left[\mathrm{M}^{1} \mathrm{~L}^{2} \mathrm{~T}^{-2} \mathrm{~A}^{-1}\right]$
- C$\left[\mathrm{M}^{1} \mathrm{~L}^{2} \mathrm{~T}^{-1} \mathrm{~A}^{-1}\right]$
- D$\left[\mathrm{M}^{1} \mathrm{~L}^{0} \mathrm{~T}^{-2} \mathrm{~A}^{-1}\right]$
Solution
Magnetic flux, $\phi=\mathbf{B} \cdot \mathbf{A}=\frac{\mathrm{F}}{\mathrm{I} \lambda} \mathbf{A}$
$=\frac{\left[M^{1} L^{+1} T^{-2}\right] L^{2}}{[A . L]}=\left[M^{1} L^{2} T^{-2} A^{-1}\right]$
Hence, the correct answer is option: 'B'.