Correct Answer: Option D

Explanation

Resonance occurs whenever the phase angle of the circuit is zero, The only way that f = 0 is if XL = XC

Note that tanϕ = \(\frac{ X }{ R}\) where X = reactance and ϕ = angle of lead or lag.

therefore, tan ϕ = \(\frac{ X_L - X_C}{ R}\) but at resonance  \(X_L = X_C\)

tan ϕ = \(\frac{0}{R}\) = 0 and ϕ = \(tan^{-1}\) = 0º

There is an explanation video available below.

• A herdsman yelling out to fellow herdsman heard his voice reflected by cliff 4s later. What is the velocity of... Answer this

  3 Answers   ·   Physics   ·   1 day ago
• NECO time table 2024? Answer this

  1 Answers   ·   7 hours ago
• A uniform bar 100cm long weighs 60N. An upward force of 50N is applied at a point 20cm from A... Answer this

  1 Answers   ·   Physics   ·   7 hours ago