Which of the following circuits represents a full-wave rectifier?

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

The $P-N$ junction diode acts as a rectifier in the circuit shown below. An alternating current source is connected to the circuit. The current in the resistor $(R)$ can be observed as follows. Which of the following is correct?

$A$ sinusoidal voltage of peak value $200\,V$ is connected to a diode and resistor $R$ in the circuit shown,so that half-wave rectification occurs. If the forward resistance of the diode is negligible compared to $R$,the rms value of voltage across $R$ is approximately (in volt):

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 ripple factor is:

For the circuit shown in the adjoining figure,to act as a full-wave rectifier,the $AC$ input should be connected across $....$ and $....$ and the $DC$ output would appear across $....$ and $....$.