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A closed magnetic circuit made from silicon steel consists of two sections, connected in series. One is of effective length 42 mm and csa 85 mm2, and the other of length 17 mm and csa 65 mm2. A 50 turn coil is wound on to the second section and carries a current of 0.4 A. Determine the flux density in the 17 mm length section if the relative permeability of the silicon iron under this condition is 3000.
Find the Thévenin equivalent circuit for the network external to the resistor R in each of the networks of given figure.
What is the Difference Between Neutral, Ground and Earth?
A description of the operation with simple calculations based on an appropriate transistor model (include the emitter resistance concept).
the transformer is to be connected as an auto transformer to supply a load at 120 V from a 210 V source. What kVA load can be supplied without exceeding the current rating of the windings (assume an ideal transformer for this part)
A 25KVA transformer supplies a load with the following schedule: 8hrs-full load with 0.8 lagging power factor. 4hrs-75% full load at unity power factor. 12hrs-No load. The transformer is energised 24hrs per day and has iron losses of350w.
What is the maximum entropy distribution for this random variable? Justify your answer.
Calculate the amplitude of the electric field intensity at a distance of 10 km in the plane of the loop.
Describe the operation of the series RC circuit. The discussion must address phase angle relationships of current and voltage. The answer must include the effect of source frequency on the voltage drops across the resistor and the capacitor at ver..
An RLC series circuit has an inductance L = 0.02H, a resistance 40 ohms, and a capacitance of 5(10)^-5 farads, and a constant voltage E(t) = 40 volts. Find the current I(t) if I(0) = 0 and Q(0) = 0 and what is the maximum current
Electrons and holes are moving in a uniform, onedimensional electric field E = +2500 V/cm. The electrons and holes have mobilities of 700 and 250 cm2/V · s, respectively. What are the electron and hole velocities
Vgs is the switchcontrol voltage. Find the switch on-resistance Rds and the voltageVds obtained when Vgs=5V and Id=1mA. If μp=0.5μn what must bethe PMOS device W/L to provide the same NMOS on-resistance. AssumeVtn=|Vtp|.
Consider the following MATLAB code: a = 0:(1/9000):4; % vector of time samples b = 100*a; % instantaneous frequency x = sin(4*pi*b.*a); (a) How many samples are in vector a, b, and x, respectively
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