NEET Physics MCQs

Four identical point charges q are placed at the corners of a square of side a. The electrostatic potential energy of the system is:

Statement-I: The electrostatic potential energy is independent of the manner in which the configuration is achicved

Statement-II: Electrostatic field is conservative field.

Assertion (A): When two unlike charges are brought nearer, their electrostatic potential energy decreases.

Reason (R) : All conservative forces act in the direction of decreasing potential energy.

Three point charges $1 \mathrm{~C},-2 \mathrm{~C}$ and $-2 \mathrm{~C}$ are placed at the vertices of an equilateral triangle of side $1 \mathrm{~m}.$ The work done by an external force to increase the separation of the charges to ${2} \mathrm{~ m}$ in joule is $\left(\varepsilon_0=ext{ permittivity of air}\right)$

The electrostatic potential energy of a charge of 15 C at a point in the electrostatic field is 105 J. The potential at that point is:

The energy stored in a parallel plate capacitor is given by $V_E=\frac{Q^2}{2 C}$. Now which of the following statements is not true? (i) The work done in charging a capacitor is stored in the form of electrostatic potential energy given by expression $V_E=\frac{Q^2}{2 C}$. (ii) The net charge on the capacitor is $Q$. (iii) The magnitude of the net charge on one plate of a capacitor is $Q$.

Three equal charges Q each are placed at the vertices of an equilateral triangle of side $l$. How much work has to be done in bringing them closer to an equilateral triangle of side $\frac{l}{2}$.

Three equal charges Q each are placed at the vertices of an equilateral triangle of side $l$. How much work has to be done in bringing them closer to an equilateral triangle of side $\frac{l}{2}$.

An elementary particle of mass $m$ and charge $+ e$ is projected with velocity $v$ at a much more massive particle of charge $Ze,$ where $Z > 0.$ What is the closest possible approach of the incident particle

An elementary particle of mass $m$ and charge $+ e$ is projected with velocity $v$ at a much more massive particle of charge $Ze,$ where $Z > 0.$ What is the closest possible approach of the incident particle