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A DC shunt motor is running at 1000rpm with terminal voltage 220V.
if terminal voltage is reduced to 110V find the speed of the machine.
An Emitter follower with a BJT biased at Ic = 1mA and having β = 100 is connected between a source with Rsig = 20kg and a load RL = 1kg. a) find Rin, vb/vsig, and v0/vsig. b) If the signal amplitude across the base-emitter junction is to be limitd t..
The shaft output of a three-phase, 60 Hz induction motor is 100 HP. The friction and windage losses are 900 W, the stator core loss is 4200 W, and the stator copper loss is 2700 W. If the slip is 3.75%, what is the effïciency of the motor
On a spacecraft two engines fire for a time of 541 s. One gives the craft an acceleration in the x direction of ax = 4.90 m/s2, while the other produces an acceleration in the y direction of ay = 7.60 m/s2.
Choose an application in business or industry that uses RL or RC circuits in its operation.
A 800 turn solenoid has a total wire length of 400 feet of AWG 24 copper wire. This wire has a resistance of 26.17 ohms per 1000 feet. The voltage measured from one end of the solenoid to the other is 21 volts. What is the mmf of the solenoid in a..
Design an air-filled C-band (5-8 GHz) rectangular waveguide such that the center frequency of this band (f= 6 GHz) is at least 25% higher than the cutoff frequency of the TE10 mode and at least 25% lower than the cutoff frequency of the next highe..
A number of SCRs, each with a rating of 2000V and 50A are to beused in series-parallel combination in a circuit to handle 11KV and400A. For a derating factor of 0.15, calulate the number of SCRs in series and parallel units.
A Fabry-Perot interferometer is to be used to resolve the mode structure of a He-Ne laser operating at 632.8 nm. The frequency separation between the modes is 150 MHz. The plates are separated by an air gap and have a reflectance of r^2=0.999.
A given cable has characteristic impedance Z0 = 100 Ohms. At a given position on the line, the voltage amplitude is 1 V. Draw a sketch (a snapshot at a fixed time) of the forward-traveling voltage and current waves on the line, showing their amplit..
What effect would the signal source impedance have on the non-inverting amplifier?
A 50-cm-long copper wire with a cross-sectional area 1.2286x10^-10 m^2 is used to connect a voltage source and a device. What is the maximum voltage if the current is required to be not bigger than 5A
A labor intensive process has a fixed cost of $338,000 and a variable cost of $143 per unit. A capital intensive (automated) process for the same product has a fixed cost of $1,244,000 and a variable cost of $92.50 per unit.
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