Question

The energy density of a magnetic field in a solenoid is \(10^{5}\,J\,m^{-3}\). Find the magnetic field.

• A. \(0.0162\,T\)
• B. \(0.0324\,T\)
• C. \(0.0081\,T\)
• D. \(0.0648\,T\)

Hint:

Magnetic energy density is \[ u=\frac{B^2}{2\mu_0}. \] If energy density is known, first calculate \(B^2\) and then take the square root.

Answer 1

The Correct Option is A