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JEE Main 202124 FebruaryEvening Shift
Exam
JEE Main
Year
2021
Date
24 February
Shift
Evening Shift
Subject
Physics
Chapter
Alternating Current

JEE Main 2021 · 24 February · Evening Shift · Physics · Alternating Current

The figure shows a circuit that contains four identical resistors...

The figure shows a circuit that contains four identical resistors with resistance R=2.0Ω,R = 2 . 0Ω, two identical inductors with inductance L=2.0mHL = 2 . 0mH and an ideal battery with E.M.F. E=9V.E = 9V . The current ii just after the switch SS is closed will be:

The figure shows a circuit that contains four identical resistors with resistance R = 2 . 0Ω, two identical inductors

Options

  1. A9A9A
  2. B3.37A3 . 37A
  3. C2.25A2 . 25A
  4. D3.0A3 . 0A

Correct answer

C. 2.25A2 . 25A

Step-by-step solution

Just after the switch is closed, inductor will behave like infinite resistance (open circuit) so the circuit will look like

The figure shows a circuit that contains four identical resistors with resistance R = 2 . 0Ω, two identical inductors

i=9R+R=94=2.25Ai = \dfrac{9}{R + R} = \dfrac{9}{4} = 2 . 25A

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