JEE Mains · Physics · STD 12 - Electric potential and capacitance
- JEE Mains 2025
- Easy
- MCQ
Identify the valid statements relevant to the given circuit at the instant when the key is closed.

A. There will be no current through resistor \(R\).
B. There will be maximum current in the connecting wires.
C. Potential difference between the capacitor plates A and B is minimum.
D. Charge on the capacitor plates is minimum.
Choose the correct answer from the options given below:
Pick an option to check your answer.
Answer & Solution
Correct Answer
(D) B, C, D Only
Step-by-step Solution
Detailed explanation
Capacitor behaves like closed circuit at \(t=0\) and charge is zero.
\(\mathrm{A} X, \mathrm{~B} \checkmark, \mathrm{C} \checkmark, \mathrm{D} \checkmark\)
\(\mathrm{A} X, \mathrm{~B} \checkmark, \mathrm{C} \checkmark, \mathrm{D} \checkmark\)
More questions from Physics
- Two cars are approaching each other at an equal speed of \(7.2\, km / hr\). When they see each other, both blow horns having frequency of \(676\, Hz\). The beat frequency heard by each driver will be \(.....\, Hz\). [Velocity of sound in air is \(340\,m / s .]\)JEE Mains 2021 Easy
- An electromagnetic wave is represented by the electric field \(\vec E = {E_0}\hat n\,\sin \,\left[ {\omega t + \left( {6y - 8z} \right)} \right]\). Taking unit vectors in \(x, y\) and \(z\) directions to be \(\hat i,\hat j,\hat k\) ,the direction of propogation \(\hat s\), isJEE Mains 2019 Medium
- Two light waves having the same wavelength \(\lambda\) in vacuum are in phase initially. Then the first wave travels a path \(L _{1}\) through a medium of refractive index \(n_{1}\) while the second wave travels a path of length \(L_{2}\) through a medium of refractive index \(n _{2}\). After this the phase difference between the two waves is:JEE Mains 2020 Medium
- In an experiment to determine the resistance of a given wire using Ohm's law, the voltmeter and ammeter readings are noted as \(10\text{ V}\) and \(5\text{ A}\), respectively. The least counts of voltmeter and ammeter are \(500\text{ mV}\) and \(200\text{ mA}\), respectively. The estimated error in the resistance measurement is _______ \(\Omega\).JEE Mains 2026 Medium
- In a metallic conductor, under the effect of applied electric field, the free electrons of the conductorJEE Mains 2023 Medium
- A rod of length \(L\) at room temperature and uniform area of cross section \(A\), is made of a metal having coefficient of linear expansion \(\alpha {/^o}C\). It is observed that an external compressive force \(F\), is applied on each of its ends, prevents any change in the length of the rod, when it temperature rises by \(\Delta \,TK\). Young’s modulus, \(Y\), for this metal isJEE Mains 2019 Medium
More PYQs from JEE Mains
- An expression of energy density is given by \(u=\frac{\alpha}{\beta} \sin \left(\frac{\alpha x}{k t}\right)\), where \(\alpha, \beta\) are constants, \(x\) is displacement, \(k\) is Boltzmann constant and \(t\) is the temperature. The dimensions of \(\beta\) will be.JEE Mains 2022 Hard
- In \(LC\) circuit the inductance \(\mathrm{L}=40\; \mathrm{mH}\) and capacitance \(\mathrm{C}=100\; \mu \mathrm{F} .\) If a voltage \(\mathrm{V}(\mathrm{t})=10 \sin (314 \mathrm{t})\) is applied to the circuit, the current in the circuit is given asJEE Mains 2020 Hard