For a half-wave rectifier, the load resistance is $R_L = 2 \, k\Omega$ and the $P-N$ junction diode resistance is $R_d = 2 \, k\Omega$. The rectification efficiency is .... $\%$.

$A$ diode detector is used to detect an amplitude modulated wave of $60\%$ modulation by using a condenser of capacity $250\, pF$ in parallel with a load resistance $100\, k\Omega$. Find the maximum modulated frequency which could be detected by it.

$A$ full-wave rectifier supplies a load of $1 \ k\Omega$. The $a.c.$ voltage applied to the diode is $220 \ V_{rms}$. If the diode resistance is neglected,the value of the ripple voltage $(rms)$ is .... $V$.

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?

If a centre-tap transformer is used with two $p-n$ junction diodes for full-wave rectification,then the output voltage of the rectifier with respect to each diode is (secondary voltage of transformer $= V_s$)

$A$ half-wave rectifier provides a load current of $1 \ k\Omega$. The input voltage is $220 \ V$. Neglecting the diode resistance,the values of average $DC$ voltage and average $DC$ current are respectively: