Assertion (A): A half wave controlled rectifier has poorer efficiency and higher ripple factor than a full wave controlled rectifier. Reason (R): The use of a freewheeling diode in half wave controlled rectifier circuit improves the waveform of load current and circuit power factor.

• Both A and R are correct and R is correct explanation of A
• Both A and R correct but R is not correct explanation of A
• A is correct but R is wrong
• A is wrong but R is correct