In the case of forward biasing of a $PN-$junction,which one of the following figures correctly depicts the direction of flow of carriers?

If the forward voltage in a semiconductor diode is doubled,the width of the depletion layer will

Which of the following components cannot be easily fabricated or obtained from an $IC$ (Integrated Circuit)?

$A$ semiconductor device is connected in a series circuit with a battery and a resistance. $A$ current is found to pass through the circuit. If the polarity of the battery is reversed,the current drops almost to zero. The device may be

$A$ source voltage of $8V$ drives the diode in the figure through a current-limiting resistor of $100 \Omega$. Then the magnitude of the slope of the load line on the $V-I$ characteristics of the diode is

In a $PN-$ junction diode not connected to any circuit: