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The circuit shown in Figure P4.24 has been set up for a long time prior to t = 0 with the switch closed. Find the value of vC prior to t = 0. Find the steady-state value of vC after the switch has been opened for a long time.
Using the items that make up a science class magnet (wire, a nail, and a small dry cell battery) as examples, explain the factors that affect the strength of a magnet.
The switch in a RC circuit is closed. If the resistance is 134462ohms, the capacitance 7.5 microF, and the applied voltage 18 volts, what is the (average) rate of change of the voltage on the capacitor, to the nearest tenth of a V/s, during the fi..
A laser beam with 2 mW power is coupled into an optical fiber link spanning 170 km. The optical fiber exhibits loss of 0.5 dB/km. Estimate the power detectable at the output end of the fiber.
Use MATLAB to compute the inverse Laplace transform of X(s)=(s^2+2s+1)/(s(s+1)(s^2+10s+50)) and determine the value of x(t) in the steady state. How would you be able to obtain this value without computing the inverse? Explain.
Sketch the baseband signals for the two users when user 1 sends the bits 011, and user 2 sends the bits 101. Add the signals for the first bit only, and show that the output of the correlator for user 1 is -4, corresponding to a 0
A power supply outputs 25Winto a load. The power supply input voltage is 115V and the inputcurrent is 0.5A. What is the effiecency of the power supply
A PWM is to be programmed to output a signal with a pulse high width of 150 usec and a pulse low width of 250 usec. What are the values required for prescale (if any) PWMPER and PWMDTY An 8-bit configuration is used and the E-clock is 24 MHz.
The counter must stop at a value which is defined by using the 8 slide switches. Use the discrete LEDs as the output to validate the counter. The counter should run when a push button ‘run' is being pressed.
A traffic light is installed at a junction of a railroad and aroad. The light is controlled by two switches in the rails placed 1mile apart on either side of the junction. A switch is turned onwhen the train is over it and is turned off otherwise.
Description of Transformer, An 11 kV to 415 V transformer has a rating of 100 kVA. The winding resistance and leakage reactance when referred to the secondary are 0.0142 Ohm and 0.0569 Ohm respectively
The amplitudes of two signals X and Y have joint pdf: fXY (x,y) = e^(-x/2)*y*e^(-y^2) for x>0 , y>0. (a) Find the joint CDF (b) Find P [sqrt(x) > y] (c) Find the marginal PDFs (d) Determine if X and Y are independent.
Use Matlab to verify the central limit theorem for the sum of N independent exponential RVs (with a=0 and b=4) for N=5, 10 and 20. Repeat for the sum of N independent RayleighRVs (with a=0 and b=4). Comment on the fit to the approximate Gaussian pdf.
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