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A step-down transformer has a120V rms primary voltage applied and a 12V rms voltage is measuredat the secondary. Assuming the transformer can be considered ideal,determine the turns ratio, n. If a1Ω load is attached to the secondary of this transformer,what is the rms load current? What is the rms primary current?
Power Factor, A single phase electric motor has an output power of 10 kW and an efficiency of 90% at full load. The motor is fed from a 240 V supply via a cable that has a resistance of 10 milli ohms per metre length.
Calculate Is and the current I for V = 700 mV for a pn junction for which Na = 1017 / cm³, Nd = 1016 / cm³, A = 200 µm², ni = 1.5 x 10^10 / cm³, Lp = 5 µm, Ln = 10 µm, Dp = 10 cm² / s, and Dn = 18 cm² / s
compute the diameter in centimeters of a steel rod, an aluminum rod, and a copper rod, which can withstand a particular compression load.
The signal transmitted by a Base Station has a power of 1 mW at a distance of 1 m from the transmitter. Measurements have shown that the propagation exponent for the path loss is n=3 up to a distance of 1 km and n=4 beyond that.
A half-wave rectifier circuit with a 1-Kwload operates from a 12-v(rms) 60-Hz household a 5-to 1 transformer having a center-tappedsecondary winding. It use two silicon diodes that can be modeled tohave a 0.7-v drop for all currents.
To digitally manipulate information we must encode it using binary numbers. Consider an encoding for playing cards. There are 52 cards in a deck and they are divided
An n-bit Gray code is a way to encode numbers 0, 1, ..., 2n-1 in binary such that any two consecutive numbers (including 0 and 2n-1) differ in exactly one bit. For example, {00, 01, 11, 10} is a 2-bit Gray code, and {00, 10, 11, 01} is the only ot..
What is the power level entering the first active stage of the receiver at 1900 MHz being fed by a 25 meter coax with a loss of 20 dB/km, given that the Isotropic Receive Level is -134 dBW and the receiving station has a 1 meter radius dish
specify the parameters Rin, Avo, and Ro of an amplifier that is to be connected between a 100k ohm source and a 2k ohm load and is required to meet the following specifications: A. No more than 10% of the signal strength is lost in the connection t..
An AC motor with impedance Z = 4.2 + j3.6 Ω is supplied by a 220 V, 60 Hz source. Determine the reactive power delivered to the load.
Find the magnetic field from a uniform current density J in a cylindrical conductor withits axis along the z-axis, and express it in cartesian coordinates
In the He Ne laser, an energetic electron is accelerated by the applied field impacts and excites the He from it's ground state 1s2, to an excited H*, 1s12s1, which has one of the electrons in the 2s orbital.
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