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Q.

In a series L-C-R circuit connected to an AC source operating at angular frequency ω=1LC and voltage of amplitude V0 the algebraic sum of the potential difference across the capacitor and inductor is :

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a

zero

b

ωCV0

c

V0ωL

d

2V0

answer is A.

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Detailed Solution

 At resonance VL=VC

So, algebraic sum of the potential difference across the capacitor and inductor is zero.

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In a series L-C-R circuit connected to an AC source operating at angular frequency ω=1LC and voltage of amplitude V0 the algebraic sum of the potential difference across the capacitor and inductor is :