<p>A coil has an inductance of 2H and resistance of 4<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>&#937;</mi></math>. An emf of 10V is applied across the coil. The energy stored in the magnetic field after the current has built up to its equilibrium value will be___________<math xmlns="http://www.w3.org/1998/Math/MathML"><mo>&#215;</mo><msup><mn>10</mn><mrow><mo>-</mo><mn>2</mn></mrow></msup><mi>J</mi></math></p>