Start Free Mock LoginAlready registered? Login here

Physics - EMI/AC Question with Solution | TestHub

PhysicsEMI/ACL-R circuitMedium2 minQB

PhysicsMediumsingle choice

The time taken for the magnetic energy to reach $25%$ of its maximum value, when a solenoid of resistance $R$ , inductance $L$ is connected to a battery, is :

Options:

Answer:

Solution:

Magnetic energy $= \frac{1}{2} L i^{2} = 25%$

$ME \Rightarrow 25% \Rightarrow i = \frac{i _{0}}{2}$

$i = i_{0} (1 - R^{- Rt / L})$ for charging

$t = \frac{L}{R} l n 2$

Stream:JEESubject:PhysicsTopic:EMI/ACSubtopic:L-R circuit

⏱ 2mℹ️ Source: QB

Doubts & Discussion

Loading discussions...