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a 500kva 3-phase 50hz transformer has a voltage ratio of 33/11kv and is delta/star connected. the resistances per phase are high voltage 35v,low voltage 876v and the iron loss is 3050w. calculate the efficiency at a full load and one half of full load respectively at unity power factor.
Suppose the voltage across a telephone line at the subscriber drops from 48V to 10V when the phone goes off hook. If the telephone instrument has a resistance of 200 ohms when off hook and represents an open circuit
A filter has the following design specifications: Cutoff frequency 1500 Hz Second-order Butterworth highpass filterSallen-Key circuit topology Determine the transfer function and realize it using the Sallen-Key circuit topology
Half-Wave Rectifier, For the half-wave rectifier, the source is a sinusoid of 120 Vrms at a frequency of 60 Hz. The load resistor is 5 ohms. Determine
The potential energy of a system of two particles separated by a distance r is given by the equation below, where A is a positive constant. U(r) = (A)/(r^11) Find the radial force vector F that each particle exerts on the other.
Design an 8-bit register with 2 control inputs s1 and s0, 8 data inputs I7..I0, and 8 data outputs Q7..Q0. s1s0=00 means maintain the present value, s1s0=01 means load, and s1s0=10 means clear. s1s0=11 means to swap
A voice frequency massage signal (fmax=B= 4 kHz) is transmitted by three binary systems: PCM (μ = 255), DPCM (α = 10), and DM. The bit rate required is Rb = 120 kbps, and m_p2/(m2 (t))= 2 a) Determine the SNR in output of each systems in dB.
A junction is an n region next to an intrinsic region, which can be represented as an ntype region to a p-type lightly doped region. At T= 300K, the doping concentrations in silicon are Nd =1018 cm-3 and Na= 1013 cm-3.
Design a second stage (Rin, Rout, and Av) to meet these specifications: a) the two-stage amplifier has an open circuit voltage gain of 120 b) the open circuit voltage gain of the second stage must be in the range 50-100
A DC motor has the following parameters: Number of armature conductors = 60, length of rotor = 30 cm, radius of rotor = 10 cm, field flux density = 1 T, armature resistance = 1.2-ohm. Neglect the armature inductance. The maximum armature current r..
A 15 hp, 209V,three-phase,six pole, Y-connected induction motor has the following parameter values per phase: R1= 0.128 ohm, R'2=0.0935 ohm Xeq- X1 + X'2 = 0.49 ohm. The motor slip at full load is 3%, and the efficiency id 90%.
Given an ideal op amp to implement designs for the following closed-loop gains, what values of resistors (R1,R2) should be used. Where possible, use at least one 10-kohm resistor as the smallest resistor in your design.
The lithographic system A uses KrF excimer laser source (248 nm) while the lithographic system B uses the I-line of a Hg lamp (365 nm) as the photon source. Give two main shortcomings of the e-beam lithography
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