KEAM 2019 Physics and Chemistry Paper

Key Idea In a series LCR circuit, the impedance is minimum at resonance and it is given as
Z=R
where, R= resistance in circuit.
As at resonance capacitive reactance is equal to inductive reactance,
So, ‌‌ωL=‌

1

ωC

⇒‌‌ω2=‌

1

LC

⇒ω=‌

1

√LC

Where, ω= angular frequency of the source.