Question

If flux density is 10 weber/m^2 and area of coil is 2 m^2,the flux is

Answer 1

answer : 20 Weber

explanation : first , you should know about magnetic flux , it is amount of magnetic lines of force passing through a given area. mathematically, magnetic flux is the dot product of magnetic field and area vector. e.g., $\bf{\phi=BA}$

magnetic flux density is the ratio of magnetic flux and area.

e.g., $\bar{B}=\frac{\phi}{A}$

here $\bar{B}$ is magnetic flux density .

given, flux density , $\bar{B}$ = 10 Weber/m²

and area = 2m²

so, magnetic flux , $\phi=\bar{B}.A$

= 10 Weber/m² × 2m² = 20 Weber .