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a. A mechanical switch, having silver contacts, is used to control a 24-V dc relay with a winding resistance of 240 Ω and inductance of 10 mH. If the switch contacts are protected by an R-C network, what value resistor and capacitor should be used?
b. If a 100-Ω resistor is used in the contact protection network, then what value capacitor would be required for the protection network to be non-oscillating (over damped)?
why is it necessary that an ammeter be a low resistance instrument Why must a voltmeter be a high resistance instrument
Determine the time of operation of 5A , 3 Seconds over current relay having a current setting of 150% and a time setting multiplier of 0.8 connected to supply circuit through a 500/5 current transformer when the circuit carries a fualt current ..
The maximum flux density in the core of a 250/ 3000 volts, 50 Hz single phase transformer is 1.2 Wb/m2. if the emf per turn is 8 volt, determine (i) primary nad secondary turns (ii) area of the core
Show that aliasing will occur if the signal y(t) = e^-t(sin)(2t) is sampled with T=0.2 by finding the z transform of the sampled sequence and then finding the inverse z transform.
What are its basic differences with respect to OTP-ROM and MP-ROM?
Make a user interface (using matlab) for amplitude modulation and demodulation without using the ammod and demmod function. The program should ask the user the 3 types of message signal (Square ,sinc,sinusoidal, triangle, sawtooth)
determine that the total field B within the sample is one tesla. Calculate M and determine what percentage of the volume now consists of domains with magnetization parallel to the field.
Assume X is normally distributed with a mean of 5 and a standard deviation of 4. Determine the value for x that solves each of the following: (a) P(X > x) = 0.5 (b) P(X
a) The input of Hex- to - seven segment decoder is 1010. what will the display show b) A priority encoder has all inputs activated. Which input will be encoded. Why c) how many select input lines are needed for a 128- to - 1 multiplexer
If an aircraft is present in a certain area,a radar correctly registers its presence with probability 0.99. If its is not present,the radar falsely registers an aircraft presence with probability 0.10. We assume that an aircraft is present with pr..
A Transconductance amplifier is to be used to interface a voltage signal Vs(t) to a resistive load R(L)=5k ohms. The signal source is represented by a Thevenin equivalent circuit with a source resistance R(S)=20k ohms.
When the required bandwidth is a large portion of the center frequency, another approach is commonly used for bandpass filter design. An example might be a filter that's required to pass frequencies from 150 Hz all the way to 5 KHz.
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