Q1: How much flux is there in a magnetic field when its flux density is 5000 T and its cross-sectional area is 300 mm²?

ANS:D - 1.5 Wb

U is permeability,
fi=b*a;
b=flux density;
a=cross sec area
B=U*H
5000*300=1500000
=1.5UWb.