IAT (IISER) 2025 | Electrostatics Question 1 | Physics

A particle of charge $q=1 e$ and mass $m$ with kinetic energy $K$ enters an electric field set up by two parallel plates of length $l$ as illustrated in the figure. The potential difference between the two plates is 1 V and their separation is $d$. What is the minimum value of $K$ (in eV ) for which the particle will not hit either of the plates? [ $e$ is the charge of the electron.]

IAT (IISER) 2025 Physics - Electrostatics Question 1 English

$\frac{l^2}{2 d^2}$

$\frac{d^2}{2 l^2}$

$\frac{l^2}{d^2}$

$\frac{d^2}{l^2}$

IAT (IISER) 2024

MCQ (Single Correct Answer)

-1

Consider two point charges $+q$ and $+2 q$ fixed on the $x-y$ plane at $(-\ell / 2,0)$ and $(+\ell / 2,0)$ respectively. Another point charge $-q$ having mass $m$ is released from rest at $(0,(\sqrt{3} / 2) \ell)$ on the $x y$ plane, as shown in the figure The permittivity of free space is $\epsilon_0$. What is the acceleration of the charge $-q$ at the time of release?

IAT (IISER) 2024 Physics - Electrostatics Question 6 English

$\frac{q^2}{8 \pi \epsilon_0 m l^2}(3 \hat{\imath}-\sqrt{3} \hat{\jmath})$

$\frac{q^2}{8 \pi \epsilon_0 m l^2}(\hat{\imath}-\sqrt{3} \hat{\jmath})$

$\frac{q^2}{8 \pi \epsilon_0 m l^2}(\hat{\imath}-3 \sqrt{3} \hat{\jmath})$

$\frac{q^2}{8 \pi \epsilon_0 m l^2}(3 \sqrt{3} \hat{\imath}-\hat{\jmath})$

IAT (IISER) 2023

MCQ (Single Correct Answer)

-1

Particle A with charge $Q$ and particle B with charge $2 Q$ are fixed at positions $\vec{r}_A$ and $\vec{r}_B$, respectively. The force on $A$ due to $B$ is $\vec{F}_{B A}$, and that on $B$ due to $A$ is $\vec{F}_{A B}$. Which of the following options is correct?

$\vec{F}_{\mathrm{AB}}=\vec{F}_{\mathrm{BA}}$

$\vec{F}_{\mathrm{AB}}=-\vec{F}_{\mathrm{BA}}$

$\vec{F}_{\mathrm{AB}}=2 \vec{F}_{\mathrm{BA}}$

$\vec{F}_{\mathrm{AB}}=-2 \vec{F}_{\mathrm{BA}}$

IAT (IISER) 2022

MCQ (Single Correct Answer)

-1

Two uniformly charged concentric thin spherical shells of radii $r_1$ and $r_2$ have charges $+Q$ and $-Q$, respectively. How does the electrostatic potential vary with distance from the center of the shells? IAT (IISER) 2022 Physics - Electrostatics Question 4 English

IAT (IISER) 2022 Physics - Electrostatics Question 4 English

IAT (IISER) 2022 Physics - Electrostatics Question 4 English Option 1

IAT (IISER) 2022 Physics - Electrostatics Question 4 English Option 2

IAT (IISER) 2022 Physics - Electrostatics Question 4 English Option 3

IAT (IISER) 2022 Physics - Electrostatics Question 4 English Option 4

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