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a Three phase to single phase converter employs a 6 pulse bridge circuit. This device is fed from 400V,50 Hz supply through a delta/stare transformer whose per phase turns ratio 3:1. Foran output frequency of 2Hz, the load reactance is w0L =3ohm. The load resistance is 4 ohms.The commutation overlap and tyristor turnoff time limit the firing mode to 1650.Compute (a) peak value of rms output voltage (b) rms output current (c) outputpower
A potentiometer is wired is wired to represent a rotational range of 0-180 degree. The potentiometer is supplied with a voltage of 15 VDC. What is the output voltage at 75 degree
An experiment consists of tossing a fair coin four times in succession. What are the possible outcomes Now count up the number of outcomes with three heads. If the outcomes are equally probable, what is the probability of three heads
Analysing an RF splitter and power levels, A splitter is a device that has a single input and several outputs. It is used to send a signal to several different locations
A negative feedback amplifier has a close-loop gain Af=100 and an open-loop gain A=105. What is the feedback factor If a manufacturing error results in a reduction of A to 103, what close-loop gain results
An LED is connected to a 74LS244 in an active-LOW configuration. The key parameters for the 74Ls244 are IOH=-15 mA, IOL=20 mA, VOH =2.0V and Vol=0.5V. The LED has a voltage drop of 2.0V and an operating current of 15 mA.
The middle C string on a piano is under a tension of 970 N. The period and wavelength of a wave on this string are 3.82 ms and 1.18 m, respectively. Find the linear density of the string.
A tank circuit coil is operating at a resonance frequency fres = 20 MHz; The circuit must operate with a bandwidth of 200 kHz. What is quality factor, Q, for the coil
Consider a pressure relief system. If consists of two values in parallel and achieves an availability of 0.95 when the valves are tested on a staggered basis, each valve being tested every 4 months. Estimate the failure rate of the values.
An embedded system consumes the following current when in different operating modes: Operating Mode Avg. Current Time Data Acquisition 4.2 mA 1.8 ms Communication 22.6 mA 2.5 ms Sleep Mode 0.5A 5 hours
Write a 4-bit up counter. Your counter has a asynchronous clear and when the clear is activated, the counter is reset to 3. The count range is from 3 to 9.
Two cards are drawn at random from a single well-shuffled deck of playing cards. What is the probability of drawing the ace of spades followed by the jack of hearts. What is the probability of drawing an ace and a jack (in either order).
A system is needed to measure flow, which continuously cycles between 20 and 30 gal/min with a period of 30 sec. The required output is a voltage varying from -2.5 to +2.5 V for the cycling flow range. The sensor to be used has a transfer function..
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