In an L C R series circuit, an inductor 30   mH and a resistor 1   Ω are connected to an AC…

In an LCR series circuit, an inductor 30 mH and a resistor 1 Ω are connected to an AC source of angular frequency 300 rad s-1. The value of capacitance for which the current leads the voltage by 45° is 1x×10-3 F. Then the value of x is

Solution

tanϕ=xC-xLR
tan45=xC-xLR
xC-xL=R
1ωC-ωL=R
1ωC-300×0.03=1
1ωC=10
C=110ω=110×300
C=13×10-3
X=3

Asked in: JEE Main 2021 (20 Jul Shift 1)

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