Page 409 - Basic Electrical Engineering

or,

Resonant current for parallel resonance is the minimum current which is the

in-phase component, i.e., I cos ϕ .
L
L
I = I ϕ = 30.9 × cos 57.5° = 30.9 × 0.537
L
0
L
= 16.6 A

The phasor diagram representing the resonant condition has been shown in
Fig. 3.72.

Figure 3.72

Example 3.43 Calculate the value of R in the circuit given in Fig. 3.73
1
such that the circuit will resonate.