KCET2015PhysicsMagnetic Effects of Current
In an LCR circuit, at resonance
Options
- Athe current and voltage are in phase
- Bthe impedance is maximum
- Cthe current is minimum
- Dthe current leads the voltage by II / ( 2 )
Correct answer
A. the current and voltage are in phase
Step-by-step solution
In an LCR circuit, at resonance the inductive reactance and capacitive reactance are equal in magnitude but in opposite direction therefore they cancel each other. Thus, at resonance the current and voltage are in phase.