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Consider N - n1n2 identical cells, each of emf e and internal resistance r. suppose n, cells are joined in series to form a line and n2 such lines are connected in parallel. The combination drives a current in an external resistance R.
(a) Find the current in the external resistance,
(b) Assuming that n, and n2 can be continuously varied, find the relation between n1, n2, R and r for which the current in R is maximum.
The mean length of the magnetic path is 1500 mm. The magnet lifts steel plates of negligible reluctance with an effective air-gap of 6 mm at each pole. Draw a sketch of the cross-section through the lifting magnet showing the pole faces, magnetic f..
Two charges, q and 5q, are separated by a distance d in air. Assume that the charge q is at the origin and the charge 5q is at x = d. A third charge is placed on the x axis so that the entire system is in equilibrium (there is no net force on any ..
design a digital logic circuit to control the electrical power of the ignition system in a speed boat engine. the
Find the complex impedance of the inductance. Find the phasor voltage and current, and construct a phasor diagram. Write the current as a function of time. Sketch the voltage and current to scale versus time. State the phase relationship between t..
Prepare a project plan for achieving the student's career goal. The plan will state a clear career goal and include a summary of all the research done in setting and defining the goal, results of self-evaluation, project management charts, a resum..
A 120 V lamp-dimming circuit is controlled by a rheostat and protect from excessive current by a 2 A fuse. To what minimum resistance value can the rheostat be set without blowing the fuse
A jet engine is modeled as a serial combination of a compressor, an adiabatic constant pressure combustor, and a turbine. Air (considered to have a variable specific heat) is compressed through a compression pressure ratio of 8.25:1
Fix the number of users K (to, say, 30) and the number of receive antennas nr (to, say, 5). Plot the symmetric rate with SDMA, orthogonal multiple access and the intermediate access scheme as a function of SNR (0 dB to 30 dB). How does the interme..
Define the doppler effect giving a practical example.- Consider the two cases of doppler efferct giving the definitions of each term used.
Calculate the efficiency of motor and generator of each having 0.0150 Ω armature resistance.
Assume that the voltage applied to a load is V = 208
From the definition of polarization (p) Perrin equation, and anisstropy (r) introduced by Jablonski, derive the interchangeable relation between p and r.
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