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The armature of a shunt generator as a 0.05 ohms resistance. Each brush has effective resistance of 0.02 ohms. The terminal voltage is 100V while the current is 40A. What is the efficiency of the generator?
Consider a portable 20cm2 fuel cell operating at 0.75V, 0.6 A/cm2. Suppose the stoichiometry of the anode is 2.0 and that of the cathode is 2.3. The fuel cell is expected to run for 3 days before being recharged.
Assume that the size of each track is the same. Compute the size of each cylinder on the disk both in terms of the number of bytes and the number of blocks. Also, compute the size of each track.
Write down the expression for the frequency-dependent open-loop gain of an operational amplifier. Sketch the magnitude of the open-loop gain of an operational amplifier as a function of frequency. Explain what is meant by a `single-lag' response o..
Find the expression for the total equivalent capacitance for an array of n capacitors with arbitrary capacitance C1,C2,...,Cn; when they are connected a) inseries and b) in parallel.
An overhead line conductor is supported at water crossing from two towers, the heights of the supports being 30 and 34.2 m respectively , above the water level , with a horizontal span of 325 m.
Draw a FBD (free body diagram) for a rocket flying at an arbitrary angle. Indicate the force vector due to gravity and force vector due to air resistance. Why does the direction of the net force change over the course of the rocket's trajectory
Calculate the potential variation V(x) , electric field and the depletion layer width for a graded p-n junction, that is one in which the doping level varies linearly with position: ND - NA = K *x.
A material has a dielectric constant of εr=3.0 andhas an atomic density of 1028 atoms per cubic meter. Ifonly two electrons in the outer orbital shell will distort with anapplied E-field, and both electrons follow the same orbital path asa pair
Suppose that a current x(t) = e^-0.5t for t > or equal to 0, and zero otherwise is applied to a discharged capacitor of capacitance C =1F at t = 0 sec. What would be the voltage in the capacitor at t= 1 seconds
A small gasoline engine can put out 18,000 N-m/min of mechanical power. The engine is used to drive an electrical generator that is 80 percent efficient. 1 N-m = 2.78 X 10-4 W-h. Find the output of the generator in Watts.
Can A Buck Converter with Synchronous rectifier operate in DCM at a light load. If the load is disconnected how does this affect the Inductor current.
Built-in voltage for a Si p-n junction is tested to be 0.6 V, NA = 2 X 10^15 cm^-3 on p side. Find ND on n side. (Assume ni = 1 x 10^10 cm^-3; and k*T/q= 0.026 V)
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