GATE2019 IN: 4

Question

In the Figures (a) and (b) shown below, the transformers are identical and ideal ,except that the transformer in Figure (b) is centre -tapped. Asssuming ideal diodes, the ratio of the root mean-square (RMS) voltage across  the resistor R in Figure (a) to that in figure (b) is

                                                                

• A. $\sqrt{2}$: 1
• B. 2: 1
• C. 2$\sqrt{2}$ : 1
• D. 4:1