GKFix MCQ Question

What is the formula for magnetic energy stored per unit volume according to the given text?

• A. $$ u_B = \frac{\mu_0 B^2}{2} $$
• B. $$ u_B = \frac{B^2}{2\mu_0} $$
• C. $$ u_B = \frac{2B^2}{\mu_0} $$
• D. $$ u_B = \frac{B}{2\mu_0} $$ What is the effective area of a coil in a magnetic field when the angle between the area vector A and the magnetic field B is θ?"
• E. A cos θ
• F. 103
• G. A sin θ
• H. A tan θ
• I. A sec θ