JEE Mains · Physics · STD 12 -Electromagnetic induction
- JEE Mains 2026
- Medium
- MCQ
Three identical coils \(C _1, C _2\) and \(C _3\) are closely placed such that they share a common axis.\(C _2\) is exactly midway.\(C _1\) carries current I in anti-clockwise direction while \(C _3\) carries current I in clockwise direction. An induced current flows through \(C _2\), will be in clockwise direction when
Pick an option to check your answer.
Answer & Solution
Correct Answer
(B) \( C_{1} \) moves towards \( C_{2} \) and \( C_{3} \) moves away from \( C_{2} \)
Step-by-step Solution
Detailed explanation
Magnetic field through the coil is
\( \vec{B}=(B_{C_{2}}-B_{C_{1}})\hat{i} \)
\( \phi=(B_{C_{2}}-B_{C_{1}})A \)
\( \epsilon=\frac{-d\phi}{dt} \)
Find the direction according to Lenz's law.
If coil move away then magnetic field decreases & vice versa
Correct Ans. (2)
More questions from Physics
- Match List - I with List - II.
List - I List - II (A) Young’s Modulus (I) \(M L^{-1} T^{-1}\) (B) Torque (II) \(M L^{-1} T^{-2}\) (C) Coefficient of Viscosity (III) \(M^{-1} L^3 T^{-2}\) (D) Gravitational Constant (IV) \(M L^2 T^{-2}\)
Choose the correct answer from the options given below :JEE Mains 2025 Medium - A thin disc of mass \(M\) and radius \(R\) has mass per unit area \(\sigma (r) = kr^2\) where \(r\) is the distance from its centre. Its moment of inertia about an axis going through its centre of mass and perpendicular to its plane isJEE Mains 2019 Hard
- A force is represented by \(\mathrm{F}=a \mathrm{x}^2+\mathrm{bt}^{1 / 2}\). Where \(\mathrm{x}=\) distance and \(\mathrm{t}=\) time. The dimensions of \(\mathrm{b}^2 / \mathrm{a}\) are _______.JEE Mains 2024 Hard
- In the figure shown, the current in the \(10\, V\) battery is close to
JEE Mains 2020 Medium - A radioactive material decays by simultaneous emissions of two particles with half lives of \(1400\, years\) and \(700\, years\) respectively. What will be the time after which one third of the material remains? (Take In \(3=1.1\) ) (In \(years\))JEE Mains 2021 Hard
- The value of power dissipated across the zener diode \(\left( V _{ z }=15 V \right)\) connected in the circuit as shown in the figure is \(x \times 10^{-1}\) watt. The value of \(x ,\) to the nearest integer, is ..............
JEE Mains 2021 Medium
More PYQs from JEE Mains
- For an adiabatic expansion of an ideal gas, the fractional change in its pressure is equal to (where \(\gamma\) is the ratio of specific heats):JEE Mains 2021 Medium
- A cylinder of radius \(R\) is surrounded by a cylindrical shell of inner radius \(R\) and outer radius \(2R\). The thermal conductivity of the material of the inner cylinder is \(K_1\) and that of the outer cylinder is \(K_2\). Assuming no loss of heat, the effective thermal conductivity of the system for heat flowing along the length of the cylinder isJEE Mains 2019 Medium
- In Bohr's atomic model, the electron is assumed to revolve in a circular orbit of radius \(0.5 \times 10^{-10}\,m\). If the speed of electron is \(2.2 \times 10^{6} \;{m} / {s}\), then the current associated with the electron will be \(....\,\times 10^{-2} \;{mA}\). [Take \(\pi\) as \(\left.\frac{22}{7}\right]\)JEE Mains 2021 Hard
- Magnetic materials used for making permanent magnets \((P)\) and magnets in a transformer \((T)\) have different properties of the following, which property best matches for the type of magnet required \(?\)JEE Mains 2020 Medium
- In a screw gauge, there are \(100\) divisions on the circular scale and the main scale moves by \(0.5\,mm\) on a complete rotation of the circular scale. The zero of circular scale lies \(6\) divisions below the line of graduation when two studs are brought in contact with each other. When a wire is placed between the studs, \(4\) linear scale divisions are clearly visible while \(46^{\text {th }}\) division the circular scale coincide with the reference line. The diameter of the wire is \(...........\times 10^{-2}\,mm\)JEE Mains 2023 Hard