Semiconductor Devices and Logic Gates · Physics · AP EAPCET
MCQ (Single Correct Answer)
At absolute zero temperature, an intrinsic semiconductor behaves as
The logic gate equivalent to the combination of logic gates shown in the figure is
In a transistor, if the collector current is $98 \%$ of emitter current, then the ratio of the base and collector currents is
In the given circuit, if $A=0, B=1$ and $C=1$ are inputs, then the values of $y_1$ and $y_2$ are respectively
$$ \text { In the given options, the diode that is forward biased is } $$
In a common emitter transistor amplifier the resistance of collector is $3 \mathrm{k} \Omega$. If the current amplification factor is 100 and the base resistance is $2 \mathrm{k} \Omega$, then the power gain of the transistor is
If $X, Y$ and $Z$ are the sizes of the emitter, base and collector of a transistor respectively, then
The logic gate equivalent to the circuit given in the figure is
In common emitter amplifier of a transistor, if the ratio of the voltage gain and current amplification factor is 4 , then the ratio of the collector and base resistances is
If three logic gates are connected as shown in the figure, then the correct truth table of the circuit is
The voltage gain and the current amplification factor of a transistor in common emitter configuration are 300 and 60 respectively. If the collector resistance is $5 \mathrm{k} \Omega$, then the base resistance is
The logic gate equivalent to the circuit shown in the figure is
When three NAND logic gates are connected as shown in the figure, then the logic gate equivalent to the circuit is
The device used for voltage regulation is
A transistor works as an amplifier when
If five logic gates are connected as shown in the figure, then the values of $y_1, y_2$ and $y_3$, are respectively
A Zener diode of breakdown voltage 20 V is connected as shown in the given circuit. The current through Zener diode is
The voltage gains of two amplifiers connected in series are 8 and 12.5 . If the voltage of the input signal is $200 \mu \mathrm{~V}$, then the voltage of the output signal is
$$ \text { The following configuration of gates is equivalent to } $$
$$ \text { Truth table for the given circuit is } $$
If $R_C$ and $R_B$ are respectively the resistances of in collector and base sides of the circuit and $\beta$ is the current amplification factor, then the voltage gain of a transistor amplifier in common emitter configuration is
The current gain of a transistor in common emitter configuration is 80 . The resistances in collector andbase sides of the circuit are $5 \mathrm{k} \Omega$ and $1 \mathrm{k} \Omega$ respectively. If the input voltage is 2 mV , the output voltage is
Four logic gates are connected as shown in the figure. If the inputs are $A=0, B=1$ and $C=1$, then the values of $Y_1$ and $Y_2$ respectively, are
Consider the statements In a semiconductor
(A) There are no free electrons at 0 K.
(B) There are no free electrons at any temperature.
(C) The number of free electrons increases with temperature.
(D) The number of free electrons is less than that in a conductor.
Output of following logic circuit is
The output current versus time curve of a rectifier is shown in the figure. The average value of output current in this case is ........... .
A change of $$0.04 \mathrm{~V}$$ takes place between the base and the emitter when an input signal is connected to the common emitter transistor amplifier. As a result, $$20 ~\mu \mathrm{A}$$ change takes place in the base current and a change of $$2 \mathrm{~mA}$$ takes place in the collector current. The input resistance and AC current gain are
The truth table given below corresponds to logic gate.
A transistor is connected in common emitter configuration. The collector supply is $$8 \mathrm{~V}$$ and the voltage drop across a resistor of $$800 \Omega$$ in the collector circuit is $$0.5 \mathrm{~V}$$. If the current gain factor $$\alpha$$ is 0.96, then the base current is