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1) The cross-sectional area of the core of a 1.2-kVA, 120/208-V, 50-Hz ideal transformer is 100 cm^2. The primary has 60 tuns. Calculate
(a) the induced emf per turn,
(b) the number of turns in the secondary, and
(c) the effective flux density in the core.
2) A power amplifier can be represented by a current source in parallel with a 200ohm resistance. An 8-ohm loudspeaker is connected to the power amplifier via an audio transformer so that maximum power is transferred to the loudspeaker. What must be the a-ratio of the transformer?
1. Choose a sampling rate of Fs = 40 kHz. 2. Create a vector t of 32768 time-sample points spaced according to this Fs, starting at 0 seconds. 3. Compute a vector x of 32768 samples of a 5400 Hz sinusoid with amplitude of square root of 2.
A 1000 turns wire are tighly wound on a toroid with a rectangular cross section, the heigh of toroid is 0.5 cm . The inner and outer radii of 2 cm and 3cm respectively. The current in the wire I=100 mA, Ur = 4000. N= 1000, Find H,B,phi and inducta..
If a seventh-order system has a row of zeros at s^3 and two sign changes below the s^4 row, how many jw poles does the system have
A certain parallel-plate capacitor, which has one plate rotating so the overlap of the plates is a function of time, has a capacitance given by C = 200 + 50 sin(5000t) pF in which the argument of the cosine function is in radians. A constant volta..
an electric field of 3.10times105 is desired between two parallel plates each of area 36.0 and separated by 0.620
Plot the values of Im and E2 superimposed on the log-log plot shown on a previous page (134) in the lecture notes. Is the 600:5 CT in saturation or not?
A 2722-kg weight is being pushed up an inclined surface at constant speed by a cylinder. The coefficient of friction between the weight and inclined surface equals 0.15. for a pressure of 6.9 MPa, determine the required cylinder diameter.
a new type of battery deleivers 10 watt of powr for 8 hours without voltage or current fluctuation. after 8 hours, however thepower output drops linearly from 10 watt to 0 in only 5minutes. (a). what is energy storage capacity of the battery
Design an ac-dc voltage converter based on half-wave rectification and filtering. The requirements are: 1. Choose the values of the load resistor R and the capacitor C so that the converter will have a ripple factor of 10%
Describe and explain drift current and diffusion current in a PN junction in thermal equilibrium. What causes each. In which directions are the electrons, holes, electron current, and hole current flowing for each effect
A pressure sensor covers a range of 0-500 psi with 2.5 mV/psi. The sensor is input to an ADC with a voltage range of 0 to 5 V. What is the value of the feedback resistor required for a non-inverting amplifier circuit required to interface the sens..
A Si sample is uniformly doped with phosphorus at 5 E 16 cm^-3. We make a p-n junction by implanting boron atoms into the surface layer. The implanted depth is 0.15 µm. What should the surface concentration of the boron implant
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