In the given circuit switch s is closed at t=0 after s is closed.
A
Direction and mangitude of current in 4Ω changes
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B
Time constant of circuit after closing switch is τ=8μs
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C
Time constant of circuit after closing switch is τ=12μs
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D
Current in 4Ω becomes zero at any instant
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Solution
The correct options are A Direction and mangitude of current in 4Ω changes
B Time constant of circuit after closing switch is τ=8μs C Time constant of circuit after closing switch is τ=12μs Before closing switch current in both resistance is i=2A clockwise After closing s, ⇒ By KVL,