In a rectifier circuit,the filter circuit:

$A$ rectifier is used to

As shown in the figure,the input is applied between $A$ and $C$,and the output is taken between $B$ and $D$. What should the output be?

The frequency of a given $AC$ signal is $N \ Hz$. When it is connected to a half-wave rectifier,the number of output pulses given by the rectifier in $1 \ s$ is:

In the diagram,the input is across the terminals $A$ and $C$ and the output is across the terminals $B$ and $D$,then the output is

In a full-wave $P-N$ junction diode rectifier,a load resistance of $1500 \ \Omega$ is used. No filter is used. Assume each diode has a forward resistance $R_f = 10 \ \Omega$ and a reverse resistance $R_f = \infty$. When an input voltage with an amplitude of $30 \ V$ and a frequency of $50 \ Hz$ is applied,what are the peak,average,and $RMS$ values of the load current,respectively?