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A DC motor is rated at 230V, 27.5A at normal full load. It turns at 1750rpm under rated conditions. It has total armature resistance of 0803 ohms, and it is desired to hold its maximum starting curr
When one push button is pushed, the selected soda is dispensed and the machine returns to its initial state. One other feature is that an LED comes on to warn the user that two quarters are not avai
Assume one LED (LED1) and one switch input (SW1). Write a while(1) { } loop that initally will blink an LED1 once power is applied. On each press OR release of SW1, alternate between terminating bli
A pnp power transistor operates with an emitter-to-collector voltage of 5V, an emitter current of 10A, and VEB = 0.85V. For ß = 15, a) What base current is required b) What is the IS for this t
a) Determine C that will lead to a resonant frequency of w0=10^8 rad/s. b) Determine the resistance R that will lead to a resonant Q of 100. c) Determine the resistance R that will lead to a resonan
The general belief is that the system exhibits a sharp phase transition from free flowing to fully jammed, as a function of initial density of cars. The existence of this sharp transition has been c
A 30hp 3 phase 360v 60 Hz induction motor has total internal losses of 2,500 watts when operating at full load. What is the motor's full load efficiency
Two loads are connected in parallel. The voltage across the loads is 8kVrms. The first load is rated at 12 kW with a 0.6 lagging power factor. The second load is rated at 20 kVA with a 0.8 lagging p
The reactance in ohms of a capacitor at frequency of 500 Hz is 145 ohms; what is the value of the capacitor in uF. The reactance in ohms of a capacitor of 10 uF at a FREQUENCY of 200 Hz is
A piston-cylinder device initially contains 1 m of nitrogen gas at 400kpa and 27 c. A resistance heater is turned on inside the cylinder which passes 70 kj of electricity to the nitrogen gas.
Write a declaration for a two-dimensional array named temperature reads. (For simplicity, assume that a month has 30 days.) The rows of the array should represent days of the month; the columns shou
Input resistance Rin=20K When fed from a signal source with a peak amplitude of 0.1v and a source resistance of 20k , the peak amplitude v(pi)is 5mv. specify Re and bias current Ic. The BJT has beta
What maximum current will be drawn from the 5V output of a peripheral device connected to an HCS12 input port. What input resistance does this represent.
The terminal on the right is the positive reference for a voltage called v y (the other terminal being the negative reference). If it takes 1 mJ of energy to push a single electron into the left ter
When writing or speaking about reactance, how do we distinguish inductive reactance from capacitive reactance. How are resistances, inductive, and capacitive reactance treated in calculations of AC vo
Compute the correlation coefficient of two channels with frequency separation of 100 kHz and temporal separation 5 ms. Assume that the maximum Doppler shift of the channels is f_d=kv=100Hz and the r
A switch is made with an n-channel MOS device in a technology for which oxide thickness is 20 nm, minimum channel length is 1 um, unCox = 100 uA/V2, and VTH = 0.8 V. The devices operates in deep tri
A 9.1 V zener diode exhibits its nominal voltage at a test current of 29 mA. At this current the incremental resistance is specified as 5 ?. The zener knee current is 1 mA. i. The zener knee voltag
Loop antennas are very common and are often used by amateur radio sites. In fact, the figure on the right is provided as an example what one may find when searching for loop antennas on the web.
A positron (same mass as electron) moving at .8c collides head on with a stationary electron producing two photons with EQUAL ANGLES relative to the incoming positron. Find the photon energies, wave
A 10 kVA transformer has an iron loss of 250 watts and a half-load copper loss of 80 watts. Determine the full-load efficiency at 0.8 power factor.
an electric kettle is required to heat 0.6 litre of water from 10 degrees celcius to boiling point in 5 minutes,the supply voltage being 240 volts. The efficiency of the kettle is 87%. Assume the sp
A perfect conductor with bias voltage Vo is insulated with a wedge shaped dielectric material of angle, =450, whose relative permittivity is εr. Use electrostatic boundary conditions to dete
Shunt capacitors are installed at the receiving end to improve the line performance. The line delivers 70 MVA, 0.8 lagging power factor at 64 kV. Determine the total Mvar and the capacitance per phas
Then, solve each Problem using hand calculations. A three-phase, 765-kV, 60-Hz transposed line is composed of four ACSR 1,431,000, 45/7 Bobolink conductors per phase with flat horizontal spacing of