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Voltmeter Calibration Most dc voltmeters measure the average value of the applied signal. A dc meter that measures the average value can be adapted to indicate the rms value of an ac signal. The input is passed through a rectifier circuit.
The rectifier output is the absolute value of the input and is applied to a dc meter whose deflection is proportional to the average value of the rectified signal.
The meter scale is calibrated to indicate the rms value of the input signal.
A calibration factor is needed to convert the average absolute value into the rms value of the ac signal. What is the required calibration factor for a sinusoid? Would the same calibration factor apply to a square wave?
Describe the microscopic structure of semiconductor materials. What are the three most commonly used semiconductor materials?
It has been said that within the next few years, smartphones will become the single most important digital device we own. Discuss the implications of this statement.
Consider an RC network that have an input x(t) and an output y(t) that is taken from the terminals of the capacitor C. a.Draw the circuit; showall the necessary symbols on the drawing. b.Find the frequency response H(jw) and the impulse response h(t)..
NATIONAL NZ ELECTRICITY TRANSMISSION GRID - Erection of additional Transmission Lines
A point charge of 1.8mC is at the centre of a cubical Gaussain surface having each side 50cm. What is the net electric flux through the surface
Three 150 kVA, 480V/4000V,60 Hz single-phase transformers are to be installed on a 4000V, 3-phase line. The exciting current has a value of 0.02 pu. Calculate the line current when the transformers are operating at no-load.
a three-phase,four pole,480 V,60 Hz,Y-connection slip-ring induction motor has the following parameters: R1=R'2=0.5 ohm ; X1+X'2=5 ohm. compute the starting torque and inserted rotor resistance that increases the starting torque by factor of 4.
Determine the second law availability efficiency of this heat exchanger.- Neglect all kinetic and potential energy effects, and take the local environment (ground state) to be 0.101 MPa and 20.0°C.
What is the fundamental frequency of the spectrum of the square wave? What is the magnitude of the fundamental frequency component of the spectrum of the square wave?
using the four basic application types introduced classify the following system and explain your classification a
Use the lower left corner of ne part as the origin in the x-y axis system. Write the part program in the word address format with TAB separation and variable word order. ?
What's the number of ADC channels on a PIC24 Microcontroller
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