JEE Mains · Physics · STD 12 -6. Electromagnetic induction
In the circuit shown here, the point '\(C\)' is kept connected to point '\(A\)' till the current flowing through the circuit becomes constant. Afterward, suddenly, point '\(C\)' is disconnected from point '\(A\)' and connected to point '\(B\)' at time \(t = 0\). Ratio of the voltage across resistance and the inductor at \(t = L/R\) will be equal to:
- A \(1\)
- B \(-1\)
- C \(\frac{{1 - e}}{e}\)
- D \(\;\frac{e}{{1 - e}}\)
Answer & Solution
Correct Answer
(B) \(-1\)
Step-by-step Solution
Detailed explanation
Applying Kirchhof's law of voltage in closed loop \(-V_{R}-V_{C}=0 \Rightarrow \frac{V_{R}}{V_{C}}=-1\)
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- Concentric metallic hollow spheres of radii \(R\) and \(4 R\) hold charges \(Q _{1}\) and \(Q _{2}\) respectively. Given that surface charge densities of the concentric spheres are equal, the potential difference \(V ( R )- V (4 R )\) isJEE Mains 2020 Medium
- In the following circuit, the switch \(S\) is closed at \(t = 0.\) The charge on the capacitor \(C_1\) as a function of time will be given by \(\left( {{C_{eq}}\, = {\kern 1pt} \,\frac{{{C_1}{C_2}}}{{{C_1} + {C_2}}}} \right).\)
JEE Mains 2018 Hard - The rms value of conduction current in a parallel plate capacitor is \(6.9\,\mu\,A\). The capacity of this capacitor, if it is connected to \(230 V\) ac supply with an angular frequency of \(600\,rad / s\), will be \(....\,pF\)JEE Mains 2022 Medium
- A solid sphere of radius 10 cm is rotating about an axis which is at a distance 15 cm from its centre. The radius of gyration about this axis is \(\sqrt{n}\) cm. The value of n isJEE Mains 2026 Easy
- The average kinetic energy of a molecule of the gas isJEE Mains 2023 Easy
- The source of time varying magnetic field may be \((A)\) a permanent magnet \((B)\) an electric field changing linearly with time \((C)\) direct current \((D)\) a decelerating charge particle \((E)\) an antenna fed with a digital signal Choose the correct answer from the options given below:JEE Mains 2023 Medium
More PYQs from JEE Mains
- The displacement of a damped harmonic oscillator is given by \(x\left( t \right) = {e^{ - 0.1\,t}}\,\cos \left( {10\pi t + \varphi } \right)\) The time taken for its amplitude of vibration to drop to half of its initial value is close to .... \(s\)JEE Mains 2019 Medium
- Refer to the figure given below. The values of \(I_1\), \(I_2\) and \(I_3\) are __________.
JEE Mains 2026 Hard - A square shaped wire with resistance of each side \(3\, \Omega\) is bent to form a complete circle. The resistance between two diametrically opposite points of the circle in unit of \(\Omega\) will be ......JEE Mains 2021 Medium
- The pitch of the screw gauge is \(1\, mm\) and there are \(100\) divisions on the circular scale. When nothing is put in between the jaws, the zero of the circular scale lies \(8\) divisions below the reference line. When a wire is placed between the jaws, the first linear scale division is clearly visible while \(72^{\text {nd }}\) division on circular scale coincides with the reference line. The radius of the wire is.........\(mm\)JEE Mains 2021 Hard
- If \(A\) is a \(3\times3\) matrix such that \(\left| {5.adjA} \right| = 5\), then \(\left| A \right|\) is equal toJEE Mains 2015 Hard
- Consider the following two statement. Statement \(p\) : The value of \(sin\,120^o\) can be divided by taking \(\theta\, = 240^o\) in the equation \(2\,\sin \frac{\theta }{2} = \sqrt {1 + \sin \theta } - \sqrt {1 - \sin \theta } \) Statement \(q\) : The angles \(A, B, C\) and \(D\) of any quadrilateral \(ABCD\) satisfy the equation \(\cos \left( {\frac{1}{2}\left( {A + C} \right)} \right) + \cos \left( {\frac{1}{2}\left( {B + D} \right)} \right) = 0\) Then the truth values of \(p\) and \(q\) are respectively.JEE Mains 2018 Hard