The electrical circuits used to get smooth $d.c.$ output from a rectifier circuit are called:

In half-wave rectification,what is the output frequency if the input frequency is $50 \;Hz$? What is the output frequency of a full-wave rectifier for the same input frequency?

Which of the following circuits provides full-wave rectification of an $A.C.$ input?

If the following input signal is sent through a $PN$-junction diode,then the output signal across $R_L$ will be:

If in a $p-n$ junction circuit,a square input signal of $5\,V$ is applied as shown,then the output across $R_L$ will be:

If a square signal of $10 \ V$ (varying from $+5 \ V$ to $-5 \ V$) is applied to a $P-N$ junction diode as shown,the output signal across $R_L$ will be: