Physics · 2024
JEE Main · 6 April 2024, Shift 2 · Q44
In a coil, the current changes from -2 A to +2 A in 0.2 s and induces an emf of 0.1 V. The self inductance of the coil is:
In a coil, the current changes from -$\displaystyle 2$ A to +$\displaystyle 2$ A in $\displaystyle 0.2$ s and induces an emf of $\displaystyle 0.1$ V . The self inductance of the coil is :
Official answer
From NTA’s final answer key for this paper.
(4)
$\displaystyle 5$ mH
More from Electromagnetic Induction
- A square loop of side 10 cm and resistance 0.7 Ω is placed vertically in east-west plane. A uniform magnetic field of 0.20 T is set up across the…2024
- Regarding self-inductance: A. The self-inductance of the coil depends on its geometry. B. Self-inductance does not depend on the permeability of the…2025
- A circular current loop of radius R is placed inside square loop of side length L(L ≫ R) such that they are co-planar and their centers coincide. The…2026
- 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…2026
- When a coil is placed in a time dependent magnetic field the power dissipated in it is P. The number of turns, area of the coil and radius of the…2026
- A 30 cm long solenoid has 10 turns per cm and area of 5 cm^2. The current through the solenoid coil varies from 2 A to 4 A in 3.14 s. The e.m.f.…2026
- A metal rod of length L rotates about one end at origin with a uniform angular velocity ω. The magnetic field radially falls off as B(r)=B_o e^-λ r;…2026
- The magnetic flux φ (in weber) linked with a closed circuit of resistance 8 Ω varies with time (in seconds) as φ=5 t^2-36 t+1. The induced current in…2024
JEE Main 2024 Physics question, with the answer from NTA’s final answer key. Where our answers come from.