Figure shows a circuit contains three identical resistors with resistance R = 9.0 \Omega each, two identical inductors with inductance L = 2.0 mH each, and an ideal battery with emf \varepsilon = 18 V. The current 'i' through the battery just after the switch closed is, ...

  • Option 1)

    2 mA

  • Option 2)

    0.2 A

  • Option 3)

    2 A

  • Option 4)

    0 ampere

 

Answers (1)
V Vakul

As we learnt in

RLC circuit Voltage -

V_{R}=iR: : : V_{L}= {i} X_{L}: : : V_{C}={i} X_{C}

- wherein

 

 At t=0, no current flows through  R1 and R3

Current through battery just after the switch closed is 

1^{1}= \frac{\varepsilon }{9}=\frac{18}{9}=2A

 


Option 1)

2 mA

This option is incorrect

Option 2)

0.2 A

This option is incorrect

Option 3)

2 A

This option is correct

Option 4)

0 ampere

This option is incorrect

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