An operational amplifier is a

The forward resistance of the diode is zero and the reverse resistance is infinite. When the positive terminal of a $2 \ V$ battery is connected to point $A$ and the negative terminal to point $B$,what current will flow through the circuit (in $A$)?

In a semiconductor diode,the reverse biased current is due to the drift of free electrons and holes caused by:

The current-voltage relation of a diode is given by $I = \left( {{e^{\frac{{1000V}}{T}}} - 1} \right) \, mA$,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 $300 \, K$,then the error in the value of the current in $mA$ is.....$mA$

The current through the ammeter (neglecting internal resistance) in the following circuit is

The potential barrier in the depletion layer is due to