JEE Main 2016 · 9 Apr · Shift 1 · Physics Q17

← JEE Main 2016 · 9 Apr · Shift 1

PhysicsSingle correct+4 / -1Question 17 of 90

A series LR circuit is connected to a voltage source with $V(t)=V_0\sin\Omega t$ . After very large time, current I(t) behaves as $\left(t_0>>\dfrac LR\right)$ :

An oscillation whose amplitude decays

I(t) from t = t₀: an oscillation inside a decaying envelope.

A sinusoid of constant amplitude

A decaying exponential

A constant

I(t) from t = t₀: a horizontal line (constant current).

Answer and worked solution

Official answer: B

Long after switching on ( $t\gg\frac LR$ ) the transient has died out, and the current is a steady sinusoid $I=\frac{V_0}Z\sin(\Omega t-\phi)$ of constant amplitude.

Topics:Reactance and impedance LR circuits

← Previous question Next question →

JEE Main 2016 · 9 Apr · Shift 1, Physics question 17