GATE EC Diode Circuits questions

The figure shows a half-wave rectifier. The diode $D$ is ideal. The average steady-state current (in Amperes) through the diode is approximately ___________.

In a forward biased $pn$ junction diode, the sequence of events that best describes the mechanism of current flow is

In the circuit shown below, $Q_{1}$ has negligible collector-to-emitter saturation voltage and the diode drops negligible voltage across it under forward bias. If $V_{cc}$ is $+5 V, X$ and $Y$ are digital signals with $0\: V$ as logic $0$ and $V_{cc}$ as logic $1,$ then the Boolean expression for $Z$ is

A voltage $1000 \sin\omega t\:\: \text{Volts}$ is applied across $YZ.$ Assuming ideal diodes, the voltage measured across $WX$ in $\text{Volts},$ is

The diodes and capacitors in the circuit shown are ideal. The voltage $v(t)$ across the diode $D1$ is

In the circuit shown below, the switch wa connected to position $1$ at $t<0$ and at $t=0$, it is changed to position $2$. Assume that $y$ the diode has zero voltage drop and a storage time $t_{s}$. For $0 < t \leq t_{s}, \text{V}_{\text{R}}$ is given by (all in volts)

Find the correct match between Group $1$ and Group $2$ …

The zener diode in the regulator circuit shown in the figure has a Zener voltage of $5.8$ volts and a Zener knee current of $0.5 \mathrm{~mA}$. The maximum load current drawn from this circuit ensuring proper functioning over the input voltage range between $20$ and $30$ volts, is

In the voltage regulator shown in the given figure, the load current can vary from $100 \mathrm{~mA}$ to $500 \mathrm{~mA}$. Assuming that the Zener diode is ideal (i.e., the Zener knee current is negligibly small and Zener resistance is zero in the breakdown region), the value of $R$ is

In a full-wave rectifier using two ideal diodes, $V_{d i}$ and $V_{i d}$ are the $d c$ and peak values of the voltage respectively across a resistive load. If PIV is the peak inverse voltage of the diode, then the appropriate relationships for this rectifier are

The circuit shown in the figure is best described as a

At $300 \mathrm{~K}$, for a diode current of $1 \mathrm{~mA}$, a certain germanium diode requires a forward bias of $0.1435 \mathrm{~V}$, whereas a certain silicon diode requires a forward bias of $0.178 \mathrm{~V}$. Under the conditions stated above, the closest approximation of the ratio of reverse saturation current in germanium diode to that in …

The output voltage of the regulated power supply shown in the figure is

In given figure a silicon diode is carrying a constant current of $1 \mathrm{~mA}$. When the temperature of the diode is $20^{\circ} \mathrm{C}, \mathrm{V}_{\mathrm{D}}$ is found to be $700 \; \mathrm{mV}$. If the temperature rises to $40^{\circ} \mathrm{C}, \mathrm{V}_{\mathrm{D}}$ becomes approximately equal to

A zener diode regulator in the figure is to be designed to meet the specifications: $I_{L}=10 \mathrm{~mA}$, $\mathrm{V}_{0}=10 \mathrm{~V}$ and $\mathrm{V}_{m}$ varies from $30 \mathrm{~V}$ to $50 \mathrm{~V}$. The zener diode has $V_{z}=10 \mathrm{~V}$ and $I_{z k}$ (knee current) $=1 \mathrm{~mA}$. For satisfactory operation.

For full wave rectification, a four diode bridge rectifier is claimed to have the following advantages over a two diode circuit : (1) less expensive transformer, (2) smaller size transformer, and (3) suitability for higher voltage application. Of these,

The static characteristic of an adequately forward biased $p-n$ junction is a straight line, if the plot is of

For small signal $a.c$. operation, a practical forward biased diode can be modelled as

In the circuit of in the figure is the current $i_{D}$ through the ideal diode (zero cut in voltage and forward resistance) equals

A half wave rectifier uses a diode with a forward resistance $\text{Rf}$. The voltage is $\text{V}_\text{m} \sin \omega t$ and the load resistance is $\text{R}_\text{L}$. The $\text{DC}$ current is given by