Physics · 2018
JEE Main · 15 April 2018, Shift 1 · Q12
A body of mass M and charge q is connected to a spring of spring constant k. It is oscillating along x -direction about its equilibrium position,…
A body of mass M and charge q is connected to a spring of spring constant k. It is oscillating along $\displaystyle x$-direction about its equilibrium position, taken to be at $\displaystyle x=0$, with an amplitude A. An electric field E is applied along the $\displaystyle x$-direction. Which of the following statements is correct ?
Official answer
(2)
The total energy of the system is
$$\frac{1}{2} m \omega^2 A^2+\frac{1}{2} \frac{q^2 E^2}{k} .
$$
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JEE Main 2018 Physics question, with the answer from NTA’s final answer key. Where our answers come from.