## MCQ (Single Correct Answer)

In the study of transistor as an amplifier if $$\alpha=\frac{I_C}{I_E}=0.98$$ and $$\beta=\frac{I_C}{I_B}=49$$, where $$I_C, I_B$$ and $$\mathrm{I}_{\...

If $$p$$-$$n$$ junction diode is in forward bias then

In the digital circuit the inputs are as shown in figure. The Boolean expression for output $$\mathrm{Y}$$ is
...

Identify the correct circuit diagrams for the normal operation from the following.
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In energy band diagram of insulators, a band gap and the conduction band is respectively

In the case of NAND gate, if A and B are the inputs and $$\mathrm{Y}$$ is the output then

A pure $$\mathrm{Si}$$ crystal has $$4 \times 10^{28}$$ atoms per $$\mathrm{m}^3$$. It is doped by 1 ppm concentration of antimony. The number of free...

The output of an 'OR' gate is connected to both the inputs of a 'NAND' gate. The combination will serve as

Which one of the operations of $$\mathrm{n}-\mathrm{p}-\mathrm{n}$$ transistor differs from that of $$p-n-p$$ transistor?

For the diagram shown, the resistances between points A and B when ideal diode D is forward biased is '$$R_1$$' and that when reverse biased is '$$R_2...

To obtain the truth-table shown, from the following logic circuit, the gate G should be
...

In insulators

Identify the mismatch out of the following.

In the reverse biasing of a p-n junction diode :

In a transistor, in common emitter configuration, the ratio of power gain to voltage gain is

If the frequency of the input voltage is $$50 \mathrm{~Hz}$$, applied to a (a) half wave rectifier and (b) full wave rectifier. The output frequency i...

For an intrinsic semiconductor $$\left(\mathrm{n}_{\mathrm{h}}\right.$$ and $$\mathrm{n}_{\mathrm{e}}$$ are the number of holes per unit volume and nu...

A $$5.0 \mathrm{~V}$$ stabilized power supply is required to be designed using a $$12 \mathrm{~V}$$ DC power supply as input source. The maximum power...

To get the truth table shown, from the following logic circuit, the Gate G should be
...

Combination of NAND gates is shown in the figure. It is equivalent to
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In an ideal junction diode, the current flowing through PQ is
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LED is manufactured using zinc selenide then it emits.

In a pure silicon, number of electrons and holes per unit volume are $$1.6 \times 10^{16} \mathrm{~m}^{-3}$$. If silicon is doped with Boron in a way ...

For a transitor, $$\frac{1}{\alpha_{\mathrm{DC}}}-\frac{1}{\beta_{\mathrm{DC}}}$$ is equal to [ $$\alpha_{\mathrm{DC}}$$ and $$\beta_{\mathrm{DC}}$$ a...

The current in the following circuit is
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The output of an 'OR' gate is 'one'

In the case of insulators, a band gap and conduction band is respectively

A rectifier is used to

Two different logic gates moving output '0' for the inputs (0, 1) and then for (1, 0) are

The frequency of a given a.c. signal is 'N' Hz. When it is connected to a half wave rectifier, the number of output pulses given by the rectifier in 1...

Silicon and copper are cooled from 300 K to 100 K, the specific resistance (resistivity)