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A 100 m-long RG 58 coax cable is terminated with 150 Ω impedance.
(a) Find the reflection coefficient.
(b) If a very short, 10 V pulse is launched at the input, calculate the time it will take for the pulse to return to the input and voltage be.
1. A sinusoidal waveform is described by the equation: v(t) = 20V sin(120pit) pi = 3.1416 What is the value of the frequency 2. A sinusoidal waveform is described by the equation
A 75 hp, 60 Hz, 2300 V, 20 A, 2 pole, wye connected, design B induction motor with code K delivers rated horsepower at 3500 r/min. Assume the phase angle of the locked-rotor impedance is 75 degrees.
A Si bar is 0.25 cm long and 500 ?m2 in cross-sectional area. It is grounded at x=0 and biased at +20V at x=0.25 cm. Find the resistance and the current at 300K (a) when the Si bar is doped with 2×1017 cm-3 arsenic
The electric field of a uniform plane wave propagating in lossless isotropic medium is E(x,t) = 60π cos(3*108 t + 4x) αy V/m. The magnetic field at point (0,0,0) when t = 0 is 1A/m. The unit of t is second and the unit of x is meter.
Given 100-MHz clock signal, derive a circuit using D flip-flops to generate 50-MHz and 25-MHz clock signals. Draw a timing diagram for all three clock signals, assuming the flip-flops introduce no delay.
The preceding example demonstrated the required amplitude response of the VSB filter. We now consider the phase response.
A permanent magnet generator has Kt = 0:02Nm/A . The terminal voltage is six volts. It is spinning at 2500 rpm. It is connected to a load with a resistance of 30W. Determine the counter torque and the power input.
1. Find the change in currents due to change of voltage by (a) 5mv,(b) -10mv, (c) 15mv using small signal model and exponential modelof diode with n= 1 and biased at 2mA. 2. A step up transformer has the turn ratio of 2:5
A permanent magnet DC motor has an armature circuit resistanceof Ra = 0.4Ω, a motorconstant KE = KT = 0.5 in MKS units, a motor intertiaof JM = 0.02Kgm2, and a maximum armaturecurrent Iamax = 20A.
What is the use of the carry output in a parallel load counter If l have a 3 bit binary parallel load counter do l connectthe count input,and the outputs (Q) from the three flip flops
Design an ionospheric radio link over a distance of 2500 Km given that the ionosphere effective height is 275 Km and the electron density N= 2*1011 /m3, namely find : i- the angle of incidence on the ionospheric layer.
Determine (a) the maximum current and the time at which it occurs; (b) the settling time; (c) the time t corresponding to the resistor absorbing 2.5 W of power.
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