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Which parameters of an op-amp become significant for a fast varying ultra low input voltage signal? What should be the values of these parameters for a triangular wave
signal of ±5 mV peak to peak with 50 MHz frequency given to a unity gain op-amp amplifier?
Suppose that Vmax value read from the graticule on an oscilloscope screen is 4.6 divisions and Vmin is 0.7 divisions. Calculate the modulation index and percentage of modulation.
Design and draw the circuit using op-amp to provide the output voltage obeying following relation of input voltages:

Vo = –10V' –0.3 (dV2/dt) –2V"
Which parameters of an op-amp become significant for a fast varying ultra low input voltage signal? What should be the values of these parameters for a triangular wave
signal of ±5 mV peak to peak with 50 MHz frequency given to a unity gain op-amp amplifier?
Which parameters of an op-amp become significant for a fast varying ultra low input
voltage signal? What should be the values of these parameters for a triangular wave
signal of ±5 mV peak to peak with 50 MHz frequency given to a unity gain op-amp
amplifier?
A direct motor is developing 90.6kW at a speed of 2000r/min. The motor is connected to a 480V supply. The cost of electrical energy is 45.4c/kWh and the efficiency of the motor is 86.4%. Calculate the torque available at the shaft of the motor
With the technology scaling and process improvement, do you think that existing CMOS (complementary metal-oxide semiconductor) will be able to exist in future?
charging and discharging characteristics of DC
(a) Here is the information about the circuit.
Capacitor = 100 nF , Resistor = 47 kΩ ,Supply voltage = 5 V
Charging characteristic for a series capacitive circuit:
v=v(1 − e−t/RC)

 Investigate what the other terms in this expression mean.
 Calculate the time constant for the circuit.
 Use a spreadsheet to plot the charging curve over the range 0 to
20 ms (milliseconds).
 Investigate the meaning of ‘time constant’ and from your graph
estimate a value. Compare this with your calculated one.
 Differentiate the charging equation and find the rate of change of
voltage at 6 ms.
 From your graph measure the gradient at 6 ms and compare this with
the calculated value.

(b) Now investigate the discharging characteristic of the circuit but with a 22 kΩ resistor
fitted.

 Calculate and estimate the rate of change of voltage when t = T.
calculate the factor of safety in operation for a component subjected to combined direct and shear loading against given failure criteria
assume that the body can be
modeled as a simple resistive element. Assuming the
electrodes are identical, draw the electrical circuit model
of the impedance seen by the impedance measurement
system. Find an equation of the impedance as a function
of s (recall that a resistor of value R has an impedance ZR
= R; a capacitor of value C has an impedance ZC = 1/(sC)).
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