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The electric motor in a street car develops a power output of80 hp at 1200 rpm as the vehicle moves up a hill at a speed of 30mph. Assume the gearing losses are negligible, calculate: (a) The torque
A large reel of paper installed at the end of a paper machinehas a diameter of 1.8m, a length of 5.6m and a moment of inertia of4500 kg-m2. It is driven by a directly coupled,variable-speed DC motor
A 1.5 kW heater and a 5 hp induction motor are operated from a 208V, three-phase supply. The motor has a full load efficiency of 80% and a full load power factor of 0.85. What is the motor current a
If the circuit electronis produce a voltage that is linearly proportional with a sensitivity of 2 V*pF^-1 to the differencebetween a 10 pF efrence cacacitor and the capacitance sensor, what is the
Themotion of this platform results in a displacement that results in acorresponding change in the electrode separation. The movingelectrode has a diameter of 8mm. -If the capacitance of this sensor
What is the approximate value of the voltage gain of an emitter follower Why may such a circuit be useful What are the values of input and output impedances of the emitter follower you expect to measu
designing a digital thermometer, which will display temperatures from -60 degrees F tp +140 degrees F. (thesystem displays the temperature to the nearest degree, so you will not need to display frac
a positive test charge is used to explore the field of asingle positive point charge Q at P(a,b,c). if the test charge isplaced at the origin, the force on it is in the direction0.5ax-0.5sqr(3ay), a
Calculate the total capacitance of the structure that consists of a dielectric inserted between two conductive parallel plates that are separated by adistance 3d. The dielectric of thickness d is in
A 3-phase power system consists of a wye-connected generatorconnected to the following loads, which are in parallel, through atransmission line. Load#1: Wye-connected load that consumes a total3-pha
A 9-V flashlight battery has a rating of 1.8 kWh. If the bulb draws a current of 100mA when lit: determine the following: (a) For how long will the flash light provide illumination
A unit of power often used for electric motors is the horse power (hp), which equals 746W. A small electric car is equipped with a 40-hp electric motor. How much energy does the motor deliver in one
A DC voltage of 10 V is applied across a parallel platecapacitor with a 2 cm separation between the plates. Knowing that the potential field distribution inside the capacitor is linear, plot the pot
The voltage across an element is 12e to the power of -2t . The current entering the positive terminal of the element is 2e to thepower of -2t . Find the energy absorbed by the element in 1.5 s start
Sketch basic characteristics of an-channel J-FET (ID vs. VDS andID vs. VGS) and explain why it may be used asa constant current source and a voltage controlled resistor.Indicate the parts of the cha
A double-balanced modulator is rated to accept signals up to+7dBm. What is the signal level expressed in: (a) watts, (b) volts rms Assume that all impedances are 50Ω and are matched.
a lightning bolt carrying 20000 A lasts for 20 microseconds. if the lightning strikes a tractor, determine the charge on the tractor if the tires are assumed to be perfect insulators.
Calculate the Thevenin equivalent voltage (in Volt) for a power source with the following characteristics: open circuit voltage Voc = 12 V and sort circuit current Isc = 5 mA.
The tolerance on resistors is + 2σ by convention, i.e.,approximately 95% confidence level. With 95% confidence, what is the range of resistance that you would expect to measure experimentally
design an inverting amplifier with an input resistance of 20kΩand a gain of-10.include a resistor to compensate for bias current.design a summing amplifier such that Vo=-(10V1+2V2+0.5V3).
Design a state machine that repeatedly produces through the following sequence of outputs 0, 1, 1, 2, 2, 2, 3, 3, 3, 3, 0, 1,2, 3, 2, 1. Note the output is not necessarly the current state ofthe mac
Convert the decimal numbers +37 and +17 to 8-bit hexadecimal numbers, using the signed 2's complement representation. Then perform the following operations: (a) (+37) + (-17), (b) (-37) + (+17), (c)
2 single-phase AC motors connected in parallel are fed from a220 volt source. The motors have the following ratings: Motor #1: 220V, POUT = 50 hp, Efficiency = 82%, PF =0.82 lagging Motor #2: 220V, PO
Using 2 wattmeters as a method of power measurement,wattmeter #1 reads 400W and wattmeter #2 reads 300W. The load isknown to be inductive and fed from a 208/120V grounded-wye 3-phase4-wire system. D
A single phase 4,800<0(degrees) V bus is connected to a singlephase 100-kW motor operating at a lagging power factor of 0.8, alighting load of 200-kW operating at a unity power factor, andstatic