When $p$-type and $n$-type semiconductors are brought into contact,they form a $P-N$ junction which acts as a .........

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 $10 \ \Omega$. Calculate the peak,average,and $rms$ values of the load current,respectively.

If an alternating voltage is applied across a $p-n$ junction diode in series with a load,then:

In a rectifier circuit,the filter circuit:

The value of the form factor in the case of a half-wave rectifier is

In the circuit shown here, assuming the threshold voltage of the diode is negligibly small, the voltage $V_{A B}$ is correctly represented by which of the following graphs?