Question

While comparing the $LC$ oscillation with the oscillation of spring-block system, with what physical quantity, the magnetic energy can be compared ?

• A. Kinetic energy
• B. Potential energy
• C. Mechanical energy
• D. None of these

Answer 1

The correct option is A Kinetic energy



We know,

$\left(1\right).$ Mass opposes the change in velocity $(V=\frac{dx}{dt})$ of the body.

$\left(2\right).$ Inductor opposes the change in current $(i=\frac{dq}{dt})$ of the circuit.

On drawing analogy between mass and inductor, mass $m$ is analogous to induction $L$ and velocity $V$ is analogous to current $i$.

Also,
Kinetic energy $=\frac{1}{2}m{V}^2$

Magnetic energy $=\frac{1}{2}L{i}^2$

Therefore, magnetic energy can be compared with kinetic energy

Hence, option $\left(\text{A}\right)$ is correct.