Which of the following depicts the output of the full-wave rectifier with a capacitor filter for the given $AC$ input?

In a half-wave rectifier using a $PN$ junction diode,the input voltage has an amplitude of $25 \ V$ and a frequency of $50 \ Hz$. No filter is used,and the load resistance is $1000 \ \Omega$. The forward resistance of the diode is $10 \ \Omega$. The $d.c.$ power output and $a.c.$ power input are respectively:

Which is the correct diagram of a half-wave rectifier?

In a half-wave rectifier, an $AC$ input source of frequency $50 \,Hz$ is used. The fundamental frequency of the output is: (in $\,Hz$)

If the maximum efficiency of a full wave rectifier is $x \%$ and that of a half wave rectifier is $y \%$,then the relation between $x$ and $y$ is

$A$ $220 \,V$ $AC$ supply is connected between points $A$ and $B$ as shown in the figure. What will be the potential difference $V$ across the capacitor?