The circuit has two oppositely connected ideal diodes in parallel. What is the current flowing in the circuit (in $A$)?

In the following circuits,which one of the diodes is reverse biased?

Which of the following represents a reverse-biased diode?

$A$ $P-N$ junction has a potential barrier of $0.5 \ V$. If the depletion region is $5 \times 10^{-7} \ m$ wide,what will be the intensity of the electric field in this region?

The current-voltage relation of a diode is given by $I = (e^{1000V/T} - 1) \; mA$,where the applied voltage $V$ is in volts and the temperature $T$ is in Kelvin. If a student makes an error of $\pm 0.01 \; V$ while measuring the voltage to obtain a current of $5 \; mA$ at $300 \; K$,what will be the error in the value of the current in $mA$?

$A$ $PN-$ junction has a thickness of the order of