WBJEE · Physics · Electromagnetic Induction

When a DC voltage is applied at the two ends of a circuit kept in closed box, it is observed that the current gradually increases from zero to a certain value and then remains constant. What do you think that the circuit contains?
- A A resistor alone
- B A capacitor alone
- C A resistor and an inductor in series
- D A resistor and a capacitor in series
Answer & Solution
Correct Answer
(C) A resistor and an inductor in series
Step-by-step Solution
Detailed explanation
Hint: LR circuit transient
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
- A pair of parallel metal plates are kept with a separation 'd'. One plate is at a potential \(+\mathrm{V}\) and the other is at ground potential. A narrow beam of electrons enters the space between the plates with a velocity \(\mathrm{v}_{0}\) and in a direction parallel to the plates. What will be the angle of the beam with the plates after it travels an axial distance L?WBJEE 2020 Hard
- A long conducting wire carrying a current \(I\) is bent at \(120^{\circ}\) (see figure). The magnetic field \(B\) at a point \(P\) on the right bisector of bending angle at a distance \(d\) from the bend is \(\left(\mu_{0}\right.\) is the permeability of free space)
WBJEE 2014 Medium - In case of a bipolar transistor \(\beta=45\). The potential drop across the collector resistance \(\begin{array}{llllll}\text { of } 1 \mathrm{k} \Omega & \text { is } 5 \mathrm{V} . & \text { The base } & \text { current } & \text { is }\end{array}\) approximatelyWBJEE 2016 Medium
- Two rods of equal length and diameter have thermal conductivities 3 and 4 units respectively. If they are joined in series, the thermal conductivity of the combination would beWBJEE 2009 Medium
- A wire of initial length \(L\) and raidus \(r\) is stretched by a length \(l\). Another wire of same material but with initial length \(2 L\) and radius \(2 r\) is stretched by a length \(2 l\). The ratio of stored elastic energy per unit volume in the first and second wire isWBJEE 2013 Easy
- The number of atoms of a radioactive substance of half-life \(T\) is \(N_{0}\) at \(t=0 .\) The time necessary to decay from \(N_{0} / 2\) atoms to \(N_{0} / 10\) atoms will beWBJEE 2013 Medium
More PYQs from WBJEE
- On \(R\), a relation \(\rho\) is defined by xpy if and only if \(x-y\) is zero or irrational. Then.WBJEE 2018 Easy
- Let \(y=e^{x^{2}}\) and \(y=e^{x^{2}} \sin x\) be two given curves. Then, angle between the tangents to the curves at any point of their intersectionWBJEE 2015 Medium
- \(f(x)\) is a differentiable function and given \(f^{\prime}(2)=6\) and \(f^{\prime}(1)=4\), then \(L=\lim _{h \rightarrow 0} \frac{f\left(2+2 h+h^2\right)-f(2)}{f\left(1+h-h^2\right)-f(1)}\)WBJEE 2023 Easy
- Choose the correct statement :WBJEE 2024 Medium
- A solid maintained at \(t_{1}^{\circ} \mathrm{C}\) is kept in an evacuated chamber at temperature \(t_{2}^{\circ} \mathrm{C}\) \(\left(t_{2} \gg t_{1}\right) .\) The rate of heat absorbed by the body is proportional toWBJEE 2015 Hard
- The ratio of the diameter of the sun to the distance between the earth and the sun is approximately \(0.009 .\) The approximate diameter of the image of the sun formed by a concave spherical mirror of radius of curvature \(0.4 \mathrm{m}\) isWBJEE 2017 Medium