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(a) Calculate the length of the blades of a 1 MW wind turbine. Assume the air density is 1.0 kg/m^3, average wind speed is 15 m/sec, and overall efficiency is 25%.
(b) An ideal solar cell is operating at30°C. The reverse saturation curren is0.15 microAmps and the solar current is constant at 1 A. Determine the open circuit voltage.
Consider the signal x (t) = 10+ 20 cos (100*2 t + 4) + 10 cos (250*2 t ) A. Using Euler's relation, the signal x(t) defined by the above equation can be expressed as a sum of complex exponentials in the form X(t) = x0 + Re{k=1N Xkejk2fot}
Assuming that directions of arrival are uniformly distributed at the mobile, how large is the correlation coefficient for a GSM 900 system between the channel in the middle and the end of the burst when the mobile station moves at 200 km/h
The upper and lower conducting plates of a large parallel-plate capacitor are separated by a distanced and maintained at potentials V0 and 0, respectively. A dielectric slab of dielectric constant 6.0
Design a current divider that will provide a 1/3-2/3 current splitting ratio. Use resistance in kilo ohm range. Redesign the current divider so that the resistors are less than 100 ohms but maintain the same 1/3-2/3 splitting ratio.
the upper critical frequency of anop-amps open loop response is 200Hz. If the midrange gain is 175,00, what is the ideal gain at 200Hz? what is th actual gain? what is the op-amps open loop bandwidth?
Discuss how the angle of the incident light affected the solar cell? How could solar cell designs and/or installations be designed to counter this affect?
Three screws are drawn at random from a lot of 100 screws, 10 of which are defective. Find the probability that the screws drawn will be nondefective in drawing (a) with replacement, (b) without replacement.
(Probability of negative lifetime is negligible) Lifetime of chip 2 is also a Gaussian RV with mean 22,000 and standard deviation 1000 hours. Which is preferred if the target lifetime of the system is (i) 20,000 hours and (ii) 24,000 hours
Sketch the theoretical torque vs. speed characteristics for a series, shunt, and compound connected DC motor. Describe what will happen if a series motor is run under no load conditions. describe what will happen if a shunt motor experiences a lo..
Assuming that the secondary is open-circuited and that the primary is connected to a 13.8-kV source, calculate the magnitude and phase angle (with respect to the high-voltage source) of the voltage at the secondary terminals.
What causes the current gain to decrease both in the case of a low collector current and at a high collector current?
Discuss the sequence of actions that occur in the operation of the control system for a traffic light that includes sensors in the roadbed. Indicate which actions are time-driven and which actions are event-driven.
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