Question

2. A toroid has 500 turns per metre length. If it carries a current of 2 A, the
magnetic energy density inside the toroid is
a) 0.628 J m3
b) 0.314 J m3
c) 6.28 J/m3
d) 3.14 J/m3​

Answer 1

Answer:

Explanation:

Magnetic field inside a toroid

B=μ0nl

Magnetic energy density inside the toroid is

u0=B22μ0=μ20n2I22μ0=μ0n2I22

=4π×10−7×(500)2×222=0.628Jm−3