Question

A magnetic field in a certain region is given by $B=(40\hat{i}-15\hat{k})\times 10^{-4} T$. The magnetic flux passes through a loop of area $5.0 \,cm^2$ is placed flat on xy plane is

• A. 750nWb
• B. -750nWb
• C. 360nWb
• D. -360nWb

Answer 1

Answer: (B)

-750nWb

Answer 2

$\phi = \overrightarrow{B}.\overrightarrow{A}$ = $[ ( 40 \hat{i} - 15 \hat{k} 10^{-4} ] [ 5 \times 10^{-4} \hat{k} ]$ = - 750 $nWb$