Advertisements
Advertisements
प्रश्न
The amplifiers X, Y and Z are connected in series. If the voltage gains of X, Y and Z are 10, 20 and 30, respectively and the input signal is 1 mV peak value, then what is the output signal voltage (peak value)
- if dc supply voltage is 10V?
- if dc supply voltage is 5V?
Advertisements
उत्तर
Total voltage amplification is defined as the ratio of output signal voltage and input signal voltage.
According to the problem. voltage gain in X, vx = 10
Voltage gain in Y, vy = 20
Voltage gain in Z, vz = 30
ΔV1 = 1 mV = 10–3 V
And Total voltage amplification = vx × vy × vz
ΔV0 = vx × vy × vz × ΔV1
= 10 × 20 × 30 ×10–3 = 6V
- If DC supply voltage is 10 V, then output is 6 V, since the theoretical gain is equal to practical gain, i.e., the output can never be greater than 6 V.
- If DC supply voltage is 5 V, i.e., Vcc = 5 V. Then, the output peak will not exceed 5 V. Hence V0 = 5 V.
APPEARS IN
संबंधित प्रश्न
Meeta's father was driving her to school. At the traffic signal, she noticed that each traffic light was made of many tiny lights instead of a single bulb. When Meeta asked this question to her father, he explained the reason for this.
Answer the following questions based on above information:
(i) What were the values displayed by Meeta and her father?
(ii) What answer did Meeta's father give?
(iii) What are the tiny lights in traffic signals called and how do these operate?
Explain with the help of a diagram, how depletion region and potential barrier are formed in a junction diode.
State its any ‘two’ uses of photodiode.
Describe, with the help of a circuit diagram, the working of a photodiode.
How is a photodiode fabricated?
The current in the forward bias is known to be more (~mA) than the current in the reverse bias (~μA). What is the reason, then, to operate the photodiode in reverse bias?
Describe briefly, with the help of a diagram, the role of the two important processes involved in the formation of a p-n junction.
What happens to the width of depletion player of a p-n junction when it is (i) forward biased, (ii) reverse biased?
Draw the circuit diagram of an illuminated photodiode in reverse bias. How is photodiode used to measure light intensity?
Explain the formation of depletion layer and potential barrier in a p−n junction.
Explain how a potential barrier is developed in a p-n junction diode.
What is a solar cell?
With reference to Semiconductor Physics,
Name the process that causes depletion region in a p-n junction.
Explain photodiode.
Name the device which converts the change in intensity of illumination to change in electric current flowing through it. Plot I-V characteristics of this device for different intensities. State any two applications of this device.
Pressure P varies as P = `alpha/beta "exp" (- (alpha x)/"k"_"BT")`, where x denotes the distance, kB is the Boltzmann's constant, T is the absolute temperature and α and β are constant. The dimension of β is ______.
Briefly explain how emf is generated in a solar cell.
Draw the circuit diagram of an illuminated photodiode and its I-V characteristics.
Identify the special purpose diodes 'A', 'B' and 'C' from the given symbols.
