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A separately excited dc motor turns at 1200rpm when the armature is connected to a 115V source. Calculate the armature voltage required so that the motor runs at 1500rpm.
an amplifier has three amplification stages and a 1-dB attenuator in cascade. Assuming that all the impedances are properly matched, what is the overall gain if the amplification factors are 5, 10, and 6 dB
F = B'D' + A'B'C + ABC + CD' Draw a circuit for this function using only AND , OR, and NOT gates. The function calls for two 3-input AND gates and one 4-input OR gate. All you have available, however, are 2-input AND and OR gates
The circuit arrangements for each of the installations, the final circuit cable selection, the maximum demand estimation, and the circuit protection arrangements should be designed.
Design an amplifier circuit which uses an OpAmp and is powered by dual 15 V power supplies, and which has the following characteristic at low frequencies: Vout = 3V1 - 5V2 1. State the information which is extracted from the equation.
The lamp is then inserted in a DC circuit and it is noticed that as the voltage increases the resistance also increases. How do you explain this apparent contradiction with Ohm's law Why does the lamp resistance increase with voltage
Light Traveling an optical fiber (n=1.44) reaches the end of the fiber and exists into air. Answer the following questions: a. if the angle of incidence on the end of the fiber is 25 degress, what is the angle of refraction outside the fiber
1. ) calculate the consumption of energy , taken from WAPDA, solar panels etc. 2. ) Transfer this data wirelessly to the grid station Please provide some ideas to implement this and list of components.
A telephone switching board can handle 120 phones. Assuming the following, and determine the outgoing traffic intensity and the number of channels
A single phase transformer has the following rating: 120 kVA, 2000 V/100 V, 60 Hz with 1000 primary turns. Determine (A) the maximum flux. (B) given a maximum flux density of 0.25 T, the cross-sectional area of the core.
The springs effect is addressed below. As a relay some contacts are connected to, and move with, the armature. Other contacts are stationary and would make or break contacts as the armature moves.
Define Root Locus and Routh-Hurwitrz, Use Routh-Hurwitz to find vales of K so that L = k (s+1) / (s^2 +4) (s+10) has poles to the left of s= -2
Find the values of I and V for the circuits assuming diode are ideal. Consider Vin=0,2,6, and 10V. Also plot V vs. Vin for Vin ranging from -10V to +10V
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