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a small cocentration of minority carrier is injected into ahomogeneous semiconductor crystal at one point. An electric feild of 10 V/cm is applied across the crystal and this moves theminority carriers a distance of 1cm in 20μsec. the mobilty (in cm2 /voltsec ) of the minority carriers is?
A Newton's ring apparatus is to be used to determine the radius of curvature of a lens (see the figure below and Problem 75). The radii of the nth and (n+16)th bright rings are measured and found to be 0.129 and 0.317 cm
A three-phase overhead transmission line has a per-phase resistance of 0.15 ohm/km, and a per-phase inductance of 1.3263 mH/km.
(1) a lighting load drawing 10kW, (2) an induction motor drawing 10 kVA at 0.9 power factor lagging, and (3) a synchronous motor operating at 10 hp, 85% efficiency and 0.95 power factor leading (1 hp = 0.746 kW). Determine the real, reactive, and ..
A transistor current source (also known as current ''sink'') was built with a 2N3904. The Ic was measured for different values of a load resistance. It was noticed that Ic was pretty much constant for the first 1900 ohms values
A sinusoidal message signal has a frequency of 10 Hz. The signal is the input to an FM modulator with an index of 8. Determine the bandwidth of the modulator output if a power ratio, Pr = 0.8 is required.
The energy (power) in Watts in an electrical circuit is described by P = VI, where V is volts and I is current
A lossless transmission line, with characteristic impedance of 50Ω and eletrical length of l=0.27λ, is terminated by load impedance 40-j25Ω. Determine voltage reflection coefficient.
A sequential circuit for a luggage lock has ten pushbuttons labeled 0,1,2,3,4,5,6,7,8 and 9. Each pushbutton 0 through 9 produces a 1 on Xi, i = 0 through 9, respectively, with all other values on variable Xj, j does not equal i, equal to 0.
If we have a 600ohm transmission line terminated with a 1200ohm resistor, how long must the transmission line be if the input impedance is purely real?
A processor has a 32 MB cache and a 64 bit data bus. What is the minimum width of the address bus needed to access the entire cache
A circuit contains a known resistance of 2.4 kO, and an unknown inductance. a) When a 12-V battery is connected, what is the current in the circuit a long time after the switch is closed
A typical commercial FM broadcast signal starts out at an effective power level around 100 KW (+80 dBm). How much of that FM signal power finds its way into the clock radio on your nightstand, or the radio in your car's dash
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