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determine the current drawn from a 3 phase 220 V line by a 3 phase 15kW motor operating at half load, 85% efficiency and .8 pf lagging. Find the values of real and reactive power drawn from the line.
An electric flux of 151 Nm2/C passes through a flat horizontal surface that has an area of 0.715 m2. The flux is due to a uniform electric field. What is the magnitude of the electric field if the field points 10.3° above the horizontal
Calculate the Fermi level position relative to conduction band (Ec-Ef) and relative to valence band (Ef-Ev).
1. Derive boundary conditions for electric fields (both for tangential and normal components) 2. Derive boundary conditions for magnetic fields (both for tangential and normal components) 3. Why boundary conditions are so important in electromagnetic..
Bill will have an adjusted gross income this year of $70,000. Valerie has an adjusted gross income of $1500 a month. Bill and Valerie have agreed that Valerie should continue working only until the federal income tax on their joint income tax retu..
From your group, pick 3 mobile phones, and/or portable devices that are rechargeable. Estimate (using resources and available data), how much electricity that is used to charge them on a weekly basis
A microscope has a 2.70-cm focal length eyepiece and a 0.630-cm objective lens. For a relaxed normal eye (assume a viewing distance of 25.0 cm), calculate the position of the object if the distance between the lenses is 13.5 cm
Plot the Bode straight-line approximation phase plot (i.e., f(f) vs. f) for the transfer function over the range f = 10 rad/s to f = 100 krad/s using the 4-cycle semi-log graph paper provided. Label all slopes in degrees/dec and all levels in degr..
A pacemaker is programmed to deliver pulses a certain times every minute for a patient with heart block. A 0.5µF capacitor controls the pulse discharges through a 2M resistor. One pulse is delivered every time the fully charged capacitor loses 50%
A byte containing 01100011 is right shifted (right-most bit first) into an 8-bit shift register with an initial state of 00110110 (01100011=>00110110) What does the shift register contain after three clock pulses
The input impedance of a JFET used in COMMON SOURCE configuration, is defined by two considerations: The JFET itself has a VERY HIGH INPUT IMPEDANCE, because the input is the GATE to SOURCE junction that is REVERSE biased
A 10-bit unipolar ADC with a reference of 5.00 F and a 44 micro seconds conversion time will be used to collect data on time constant measurement. Thus, the input will be of the form V (t) = 4(1-e^t/T) . What is the minimum value of T
A curve of radius 159 m is banked at an angle of 11°. An 810-kg car negotiates the curve at 93 km/h without skidding. Neglect the effects of air drag and rolling friction. Find the normal force exerted by the pavement on the tires.
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