List of top Physics Questions on Electrical Circuits asked in IISER

A particle of charge $q = 1e$ 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 $1\text{ V}$ and their separation is $d$. What is the minimum value of $K$ (in $\text{eV}$) for which the particle will not hit either of the plates? [$e$ is the charge of the electron.]}

Consider the circuit diagram as shown in the figure. The source has a voltage \(V = V_0 \sin \omega t\). Both the resistors A and B have the same resistance. The capacitor and the inductor have capacitance \(C\) and inductance \(L\), respectively. For some frequency \(\omega\), and certain initial charge in the capacitor, the current through the resistor A is in phase with the source. What is the value of \(\omega\)?

Consider the circuit shown in the figure. The capacitors C1 and C2 have capacitances \(2\ \mu\text{F}\) and \(8\ \mu\text{F}\), respectively. The switch can connect point X to either Y or Z. Initially XY is connected until the capacitor is fully charged by the battery. Then the switch connects X and Z, and the final charges on C1 and C2 are \(Q_1\) and \(Q_2\), respectively. What is the value of the ratio \(\frac{Q_2}{Q_1 + Q_2}\)?