AP EAMCET · PHYSICS · Electromagnetic Induction
A long solenoid having 100 turns per \(\mathrm{cm}\) carries a current of \(\frac{4}{\pi}\) A. At the centre of it is placed a coil of 200 turns of cross-sectional area \(25 \mathrm{~cm}^2\) having its axis parallel to the field produced by the solenoid. When the direction of the current in the solenoid is reversed with in \(0.04 \mathrm{~s}\), the induced emf in the coil is
- A \(0.2 \mathrm{~V}\)
- B \(0.4 \mathrm{~V}\)
- C \(0.002 \mathrm{~V}\)
- D \(0.016 \mathrm{~V}\)
Answer & Solution
Correct Answer
(B) \(0.4 \mathrm{~V}\)
Step-by-step Solution
Detailed explanation
Due to solenoid a magnetic field exists around coil placed at centre Magnetic field intensity produced by solenoid, \(B=\mu_0 n I\) Flux linked with coil is \(\phi_B=N . B \cdot A\) Where, \(N=\) Number of turns in coil \(A=\) Area of coil As current in solenoid is reversed,…
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
- One litre of oxygen at a pressure of \(1 \mathrm{~atm}\) and two litres of nitrogen at a pressure of \(0.5 \mathrm{~atm}\), are introduced into a vessel of volume \(1 \mathrm{~L}\). If there is no change in temperature, the final pressure of the mixture of gas (in atm) isAP EAMCET 2008 Hard
- The energies required to set up in a cube of side \(10 \mathrm{~cm}\)
(i) a uniform electric field of \(10^7 \mathrm{Vm}^{-1}\) and
(ii) a uniform magnetic field of \(0.25 \mathrm{Wbm}^{-2}\) are respectively about
\[
\left(\mu_0=4 \pi \times 10^{-7} \mathrm{Hm}^{-1}, \varepsilon_0=8.9 \times 10^{-12} \mathrm{Fm}^{-1}\right)
\]AP EAMCET 2018 Medium - A river of salty water is flowing with a velocity \(2 \mathrm{~m} / \mathrm{s}\). If the density of the water is \(1.2 \mathrm{~g} / \mathrm{cc}\), then the kinetic energy of each cubic metre of water isAP EAMCET 2008 Medium
- A charge \(q\) moving in a circle of radius \(r\) metre makes \(n\) rev/s. Magnetic field at the centre of the circle isAP EAMCET 2020 Medium
- A coil of 45 turns and radius 4 cm is placed in a uniform magnetic field such that its plane is perpendicular to the direction of the field. If the magnetic field increases from 0 to 0.70 T at a constant rate in a time interval of 220 s, then the induced emf in the coil isAP EAMCET 2025 Medium
- A flask contains argon and chlorine in the ratio of \(2: 1\) by mass. The temperature of the mixture is \(27^{\circ} \mathrm{C}\). The ratio of average kinetic energies of two gases per molecule isAP EAMCET 2015 Easy
More PYQs from AP EAMCET
- A cylinder contains a mixture of \(5 \mathrm{~g}\) of \(\mathrm{N}_2\) and \(6 \mathrm{~g}\) of Ar gases. If the total pressure of the mixture of the gases in the cylinder is 30 bar, then the partial pressure of \(\mathrm{N}_2\) gas isAP EAMCET 2021 Easy
- \(\int \frac{x-1}{(x+1) \sqrt{x\left(x^2+x+1\right)}} d x=\)AP EAMCET 2018 Medium
- \(3 \hat{i}-2 \hat{j}-\hat{k},-2 \hat{i}-\hat{j}+3 \hat{k}\) and \(-\hat{i}+3 \hat{j}-2 \hat{k}\) are the position vectors of the vertices \(A, B\) and \(C\) of a \(\triangle A B C\) respectively.
If \(\mathrm{H}\) is its orthocenter, then \(\overrightarrow{\mathrm{HA}}+\overrightarrow{\mathrm{HB}}+\overrightarrow{\mathrm{HC}}=\)AP EAMCET 2023 Hard - \(\int_0^{2 \pi} \sin ^6 x \cos ^5 x d x\) is equal toAP EAMCET 2007 Medium
- The general solution of the differential equation \((2 x-y)^2 d y-2(2 x-y)^2 d x-2 d x=0\) isAP EAMCET 2025 Medium
- If the tangent to the curve \(2 y^3=a x^2+x^3\) at the point \((a, a)\) cuts off intercepts \(\alpha\) and \(\beta\) on the coordinate axes, where \(\alpha^2+\beta^2=61\), then the value of \(|a|\) isAP EAMCET 2021 Medium