Question

state the condition for resonance to occur in a series lcra coli is connected to a low voltage bulb . it's placed parallel to another coil. a connected to an a.c. source​

Answer 1

Answer:

Condition for resonance to occur in series LCR ac circuit:

For resonance the current produced in the circuit and emf applied must always be in the same phase.

Phase difference (φ) in series LCR circuit is given by

tanφ=

R

X

C

−X

L

For resonance, φ=0⟹X

C

−X

L

=0 or X

C

=X

L

If ω

r

is resonant frequency, then X

C

=

ω

r

C

1

and X

C

=ω

r

L

ω

r

C

1

=ω

r

L⟹ω

r

=

LC

1

Linear resonant frequency, f

r

=

2π

ω

=

2π

LC

1