Question

Find the dimension of B²/2μ₀

(1) ML^-1T^-2

(2) ML²T^-2

(3) ML^-1T²

(4) ML^-2T^-1

Answer 1

Answer is (1)

Energy density in magnetic field = B²/2μ₀

= {Force x displacement}/{(displacement)3}

= {MLT^-2.L}/{L³} = ML^-1T^-2