In the given circuit,two ideal diodes are connected in parallel in opposite directions. What is the current $I$ flowing in the circuit (in $A$)?

The circuit shown in the figure contains two diodes,each with a forward resistance of $30 \, \Omega$ and infinite backward resistance. If the battery is $3 \, V$,the current through the $50 \, \Omega$ resistance (in ampere) is

In the following circuit,the reading in the ammeter is (in $mA$)

In a $p-n$ junction diode, the thickness of the depletion layer is $2 \times 10^{-6} \,m$ and the barrier potential is $0.3 \,V$. The intensity of the electric field at the junction is

Which of the following statements concerning the depletion zone of an unbiased $PN$ junction is (are) true?

Assuming the ideal diode,draw the output waveform for the circuit given in the figure. Explain the waveform.