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Consider the following arrays. A = 1 4 2 2 4 100 7 9 7 3 42 B=ln(A) Write MATLAB expressions to do the following. a- Select just the second row of B. b- Evaluate the sum of the second row of B. c- Multiply the second column of B and the first column of A. d- Evaluate the maximum value of the vector resulting from element-by-element multiplication of the second column of B with the first column of A.
Semiconductor A is direct band gap and semiconductor B is indirect gap. For providing same short circuit current density of a solar cell, which material will need more thickness
A lighting load operates from a 208-V 60-Hz supply and is rated 1.0 kW with a power factor of 0.9 lagging. A 40-µF capacitor is connected in parallel with this load. Calculate the total power factor and the percent change in line current.
A 5,600 km long transatlantic (NYC-London) communications cable made of optical fibers with nf~ 1.5. A white light pulse is generated at the input end in NYC. Refractive index for red light is nred =1.51, and for blue light nblue = 1.53.
A 5-volt intelligence amplitude causes the frequency to change to ± 25 kHz. What will be the carrier frequency variation corresponding to an intelligence amplitude of 10 volts
RC ciruit= Current course (3u(-t) A) in parrallel to 6k ohm resistor and 5uF cap. Determine the instantaneous power absorbed by the resistor at t=(0); 30ms; and 90ms.
Three Single-Phase two-winding transformers, each rated 25 MVA, 38.1/3.81 kV, are connected to form a three-phase Wye-Delta bank with a balanced Y-connected resistive load of 0.6 ohms per phase on the low-voltage side.
A 150MW alternator generates an open-circut line-t0-line voltage of 12kV at nomial DC excitiation. When the terminals are placed in short-circuit the resulting current per phase is 8000A.
the circuit has been connected for several seconds, find current in (a). in the 4.00 volts battery, (b). in the 3.00 ohm resistor, (c). in the 8.00 volts battery, (d). in the 3.00 volts battery and (e). find the charge on the capacitor?
A proportional control system id to be used to control the wing flaps of a jet airplane. The wind load is expected to cause as much as 600 in*lb of torque. The system should be able to keep the flaps to within 5 degrees of the set point.
Two coupled coils have self-inductances L1 = 50 mH and L2 = 200 mH, and a coefficient of coupling k = 0.5. If coil 2 has 1000 turns, and I1 = 5Sin (400t) (i.e. the phasor current is 5? -90° A). Find the voltage at coil 2 and the flux through coil ..
Assuming exact valued resistors what output voltage (measure to ground) and equivalent output resistance result if the resistor used are not ideal but have a +-5% manufacturing tolerance what are the extreme output voltafes and resistances that ca..
Two transistors, fabricated with the same technology but having different junction areas, when operated at a base-emitter voltage of 0.72 V, have collector currents of 0.2 mA and 12 mA. Find Is for each device.
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