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An ac bridge has the following constants : arm AB, R= 1,000Ω in parallel with C=0.159μF; BC, R=1,000Ω; CD, R=500Ω; DA, C=0.636μF in series with an unknown resistance.Find the
A balanced ac bridge has the following constants arm AB, R= 2,000Ω in parallel with C= 0.047μF; arm BC, R=1,000Ω in series with C= 0.47μF; arm BC, R=1000Ω in series with C= 0
The electric field of a uniform plane wave propagating in lossless isotropic medium is E(x,t) = 60(pi)cos(3 10 t + 4x) ay V/m. The magnetic field at point (0,0,0) when t = 0 is 1A/m. The unit of t i
The flow-rate of blood is assumed to be at high enough a rate that blood behaves as a Newtonian fluid. The fiber diameter is 600 microns and their length is 30 cm. You want a flow-rate of 12 ml/min
Let the current int he circuit be is(t) = u(t -1) and the initial voltage in the cap be Vc(0) = -1 volts. PLOT the voltage in the cap Vc(t) for all times. Suppose we double the current is(t) = 2u(t)
redesign the 1s-counting machine, assigning the states in the binary counting order (S0-S3=00,01,10,11). Compare the cost of the resulting sum-of-product excitation equations with the ones derived i
Design a low cost white LED based emergency light that turns on when the main supply fails, and turns off when the main supply resumes. The circuit must have its own battery charger. When the batter
Frank D. Drake, an investigator in the SETI (Search for Extra-Terrestrial Intelligence) program, once said that the large radio telescope in Arecibo, Puerto Rico, can detect a signal which lays down
A 10 kW laser beam pointing at the ship is turned on at t=0. What speed the ship will attain in 1 day assuming that the surface of the ship is perfectly reflective and perpendicular tot the beam.
You are the operator of a 15,000 V 60 Hz electrical substation. When you get to work one day you see that the station is delivering 6.0 MW of power with a power factor cosf=0.9. What is rms current.
A switch closes at t=0 and the capacitor is discharged through the wire with 1 Ohm resistance. Find the expression for the magnetic field strength inside the capacitor 1 cm from the axis as a functi
A 40 Ω Resistor, a 5mH inductor, and a 1.25μF capacitor are connected in series. The series-connected elements are energized by a sinusoidal voltage source whose voltage is 600 cos(8000t +
Show x(t + 2) = x(t) and y(t +2) = y(t). Then use the representation of cosine in terms of complex exponential cos(thetat) = e^j theta + e ^ -jtheta / 2; to express the intergrand in terms of expone
determine a small signal parameter gm,rpi of a transistor with parameters betta = 180 for bias current of I sub cq = 0.5mA
A collimated light beam from a helium-neon laser at 632.8 nm wavelength impinges on a dielectric film of refractive index of 2.0 at an angle of 75 degrees to normal, with a polarization at 45 degree
What is the difference between constant voltage biasing, constant voltage biasing with a source resistance, and constant current source biasing, in terms of advantages and disadvantages over the oth
Using only resistors, capacitors and op-amps design a circuit meeting the following criteria: The circuit acts as a band pass filter. The 3dB points arer at 100 and 1000 Hz. The mid-range gain is -1
A particular load has a pf of 0.8 lagging. The power delivered to the load is 40 kW from a 220-V rms 60-Hz line. What value of capacitance placed in parallel with the load will raise the pf to 0.9 l
Sketch the phasor diagrams for the following waveforms: v1 = 80sin(pi*t + 35°)(a) What is the phase difference between v1 and v2 (b) Determine which voltage leads and which lags.
The minimum useful bandwidth of the amplifier should range from 10Hz to 100KHZ, and this can be determined by the frequency of vin.The maximum peak value of vin is 0.5V. The specified coupling capa
Suppose that a voltage given by v(t) = 45 sin(100pt- 70°) is applied to a 9 O resistance. Sketch v(t) to scale versus time (make sure to put the labels on graph). Find the rms value of the volta
An ideal inverting operational amplifier is configured for a negative feedback loop such that Rf and Rin are equal in magnitude. Vin is a +10 V DC voltage source. A second DC voltage source is conne
Assume that the motor is operating in the range for which torque is proportional to slip and write an equation for motor torque in terms of slip when operating at rated voltage. Then modify the equa
Assume the resistance of a certain type of resistor is normal distrubuted random variable with mean =12.8 ohms and standard diviation of =1.3ohms. if a single reistor is to be randomly selected from
A 40 H resistor, a 5 mH inductor, and a 1.25 uF capacitor are connected in series. The series-connected elements are energized by a sinusoidal voltage source whose voltage is 600 cos (8000^ + 20°