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A.The car lead-acid battery has generally 12 V output voltage, and its internal resistance is so small that can be neglected. When starting the engine, the current of 462 A is flowing from the battery to supply the "car starter" (an electrical motor that starts the engine engine). How much power does the "car starter" consume when starting the engine?
B.Now let's try using a pack of AA batteries (1.2 V output voltage and 0.15 Ohm internal resistance each) to replace the lead-acid battery. In order to match the car lead-acid battery, first 10 such AA batteries need to be connected in series to form a 12V cell, while 50 such cells need to be connected in parallel. Find the power that is supplied to the same "car starter" using this pack of AA batteries.
(Hint: for the second question, you need to find the total voltage and the internal resistance of the whole pack; you also need to find the resistance of the "car starter"; this can be done using the data of the first part of this problem)
Write a brief explanation of the principles of the super-heterodyne receiver. It may help to use a simple block diagram to express the process. Explain the purpose of the Intermediate Frequency amplifiers,
Write a program that will read scores into an array. The size of the array should be input by the user (dynamic array). The program will find and print out the average of the scores. It will also call a function that will sort the scores in ascendi..
Let x(t) = |cos120pit| a periodic signal. Plot x(t). What is the period and frequency of x(t). Expand x(t) in trigonometric Fourier series Hint: use the plot to find the Fourier coefficients.
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Which FET operates in both Depletion and Enhanced mode and how do you recognize the mode by just looking at the Family of Drain Characteristic Curves
If we want to receive an FM station that broadcast on frequency = 100 MHz and we have to build a tunning circuit of LC utilizing a capacitor of 10pF. Design an inductor L to make tune by using your plastic Pin as a core for widing
Draw a strain gauge circuit and its external components to attach to a conveyor mounted only at the ends to measure the load at the center of the conveyor. What type of testing would you need to do to establish a baseline and calibration curve for..
A single phase 1750 RPM moter operating at rated power has a power factor of 0.75 lagging. the line voltage is 208 VAC @60 Hz and the line current is 27A. Assuming 83% is a reasonable efficiency for moters of this size
a solid cylindrical conductor of raduis a and charge Q is coaxial with a cylindrical shell of negligible thickness,radius b,and charge -Q. FIND THE CAPACITANCE OF THIS CYLINDRICAL capacitor if its length is l.
a) Determine the self inductance of coil 1, L11 b) Determine the self inductance of coil 2 L22 c) Determine the mutual inductance between the two coils, L12 or L21
The equivalent inductance of the primary and the secondary circuits is .02H. The frequency of the primary windings is 10Hz. Assume that the drag force is 500N and the friction force is 2kN. Compute the voltage across the primary windings when the ..
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