Question

In comparison to a half wave rectifier, the full wave rectifier gives lower
A. Efficiency
B. Average dc
C. Average output voltage
D. None of these

Answer 1

Hint: In the solution we will use the comparison concept of efficiency, average dc and average output voltage between half wave rectifier and full wave rectifier. They represent the several parameters like rectification efficiency, average DC and average output voltage.

Complete step by step answer:
Given:A half wave rectifier and a full wave rectifier.
-We will first see the comparison data of rectification efficiency of half wave rectifier and full wave rectifier. The rectification efficiency of a half-wave rectifier is $40.6\% $ and for the full wave rectifier is $81.2\% $. So the rectification efficiency of a full wave rectifier is greater than half wave rectifier.The D.C output voltage of half-wave rectifier is represented by the formula $\dfrac{{{I_{{\rm{max}}}}}}{{\pi RL}}$ and the D.C voltage of full-wave rectifier is represented by the formula $\dfrac{{2{I_{{\rm{max}}}}}}{{\pi RL}}$. So the D.C voltage of a full-wave rectifier is higher than that of a half-wave rectifier.
-The half-wave rectifier converts only one-half of the A.C cycle into the D.C whereas the full-wave rectifier converts the entire cycle of A.C into D.C. So the average output voltage is higher in case of full-wave rectifier compared to half-wave rectifier.
Therefore, the option (a) , option (b) and option (c) are incorrect and the final required answer from the given options would be option (d), none of these.

Note: For these types of questions we have to remember one thing that all the parameters of a full-wave rectifier are always larger than half-wave rectifiers. In the conversion of A.C to D.C, full-wave rectifiers are more useful compared to half-wave rectifiers.