The truth table for the following logic circuit is :

LED is constructed from Ga-As-P semiconducting material. The energy gap of this LED is 1.9 eV. Calculate the wavelength of light emitted and its colour. [h = 6.63 $$\times$$ 10$$-$$34 Js and c = 3 $$\times$$ 108 ms$$-$$1]

Draw the output signal Y in the given combination of gates.

The following logic gate is equivalent to :

The output of the given combination gates represents :

Which one of the following will be the output of the given circuit?

The correct relation between $$\alpha$$ (ratio of collector current to emitter current) and $$\beta$$ (ratio of collector current to base current) of a transistor is :

For the circuit shown below, calculate the value of Iz :

Consider a situation in which reserve biased current of a particular P-N junction increases when it is exposed to a light of wavelength $$\le$$ 621 nm. During this process, enhancement in carrier concentration takes place due to generation of hole-electron pairs. The value of band gap is nearly.

Identify the logic operation carried out.

Find the truth table for the function Y of A and B represented in the following figure.

Identify the logic operation carried out by the given circuit :-

Statement I : By doping silicon semiconductor with pentavalent material, the electrons density increases. Statement II : The n-type semiconductor has net negative charge. In the light of the above statements, choose the most appropriate answer from the options given below :

Four NOR gates are connected as shown in figure. The truth table for the given figure is :

For a transistor in CE mode to be used as an amplifier, it must be operated in :

For a transistor $$\alpha$$ and $$\beta$$ are given as \alpha = {{{I_C}} \over {{I_E}}} and \beta = {{{I_C}} \over {{I_B}}}. Then the correct relation between $$\alpha$$ and $$\beta$$ will be :

In the following logic circuit the sequence of the inputs A, B are (0, 0), (0, 1), (1, 0) and (1, 1). The output Y for this sequence will be :

Choose the correct waveform that can represent the voltage across R of the following circuit, assuming the diode is ideal one :

If VA and VB are the input voltages (either 5V or 0V) and V0 is the output voltage then the two gates represented in the following circuit (A) and (B) are :-

Statement - I : To get a steady dc output from the pulsating voltage received from a full wave rectifier we can connect a capacitor across the output parallel to the load RL. Statement - II : To get a steady dc output from the pulsating voltage received from a full wave rectifier we can connect an inductor in series with RL. In the light of the above statements, choose the most appropriate answer from the options given below :