CUET Preparation Today
The expression of the magnetic energy stored in a solenoid in terms of magnetic field $B$, cross-sectional area $A$ and length $l$ of the solenoid, is: |
$U_B=\frac{1}{2μ_0}B^2Al$ $U_B=\frac{1}{μ_0}B^2Al$ $U_B=\frac{1}{2μ_0}B^2\frac{A}{l}$ $U_B=μ_0B^2Al$ |
$U_B=\frac{1}{2μ_0}B^2Al$ |
The correct answer is Option (1) → $U_B=\frac{1}{2μ_0}B^2Al$ |
