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A 10kW 220-V single-phase motor is operating at 0.7 lagging power factor. Find the value of the capacitor that needs to be connected in parallel with the motor , if the power factor is to be improved to 0.95 lagging.
A balanced star load of 8+j6 O per phase is connected to three-phase, 230 V supply. Find the line current, power factor, power, reactive VA and total VA.
A source emits seven messages with probabilities 1/2, 1/4, 1/16, 1/32, 1/64, 1/128, and 1/128 respectively. Find entropy of the source. Encode this source using tartary Huffman coding, that is, encoding it using three symbols, say ‘0', ‘1', and ‘2'
If inductive load has a 2ohm resistance and 2microhenry inductance in series with a 120V/60Hz source and a capacitor is connected parallel to the entire load so no reactive power is being delivered by the source what is the capacitance value.
In a CD player, the sampling rate is 44.1 kHz and the samples are quantized using a 16-bit/sample quantizer. what is The resulting number of bits for a piece of music with a duration of 50 minutes.
Let y(t) he the signal at the output of the LTI system when x(t) is the input signal. The following signals are sampled using a train of impulses with periodicity T, signal x(t) is sampled to obtain xc(t), and signal y(t) is sampled to obtain yc(t..
Let x(t) and y(t) be two real, periodic signals that are orthogonal to each other. Show that the power of the sum of the signals (i.e., x(t) + y(t)) is equal to the sum of the individual powers (i.e., Px + Py).
The built-in voltage of a GaAs pn junction diode is 1.25 V when the diode's temperature is T = 320 K. The cathode region of the diode is doped with phosphorus at a concentration of 1017 cm-3. Determine the required doping concentration in the anod..
The schematic of the traffic light controller
Given a parallel resonant circuit with the following components: a 10mA source with a zero degree phase angle in parallel with a 10k ohm source resistance, a parallel inductor of 80uH with an internal resistance of 1.5 ohms
(a) Using the default power transistors, determine the minimum supply rail voltage required if TJ
Design a datapath which inputs three 3-bit unsigned numbers x,y, and z. If z is the binary representation for 3 or 7, output x + y. If z is the binary representation of 4 or 6, output x + z. If z is anything else, output y + z.
Consider a half-wave rectifier circuit with a triangular wave input of 5-V peak to peak amplitude and zero average, and with R=1kΩ. Assume that the diode can be represented by the constant-voltage-drop model with Vd=0.7V. Find the average value of..
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