Which of the following figures represents a half-wave rectifier?

In a full-wave rectifier,the input $AC$ current has a frequency '$v$'. The output frequency of the current is

In a full-wave rectifier circuit, the input frequency is $50 \, Hz$. The fundamental frequency of the ripple is ....... $Hz$.

How many junction diodes are used for half-wave and full-wave rectifiers,respectively?

$A$ half-wave rectifier is used to supply $100 \, V$ $dc$ to a load of $800 \, \Omega$. The diode resistance is $200 \, \Omega$. The $ac$ voltage required is :.......$V$

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