COMEDK202510 May 2025Evening ShiftPhysicsAlternating CurrentActual
In which of the following circuit do we find the current and voltage in phase?
Options
- AA purely capacitive circuit
- BA circuit in which an inductor and a capacitor are in series.
- CA purely inductive circuit
- DA purely resistive circuit
Correct answer
D. A purely resistive circuit
Step-by-step solution
In an AC circuit, the phase relationship between voltage V and current I depends on the nature of the components present. For a purely capacitive circuit, the current leads the voltage by a phase angle of 2 . For a purely inductive circuit, the current lags behind the voltage by a phase angle of 2 . For a circuit containing an inductor and a capacitor in series, the phase difference depends on the values of inductive reactance X_L and capacitive reactance X_C . The phase angle is given by = X_L - X_C R . Only when