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A 3-phase induction motor is rated at 440V,60Hz, 1140rpm. The motor gives the output torque of 20 N-m at the rated speed. The mechanical losses are equal to 1kW. The stator losses are 1.5kW. Find the input current of the motor, given that the power factor is 0.8 (lagging).
Design an amplifier circuit which uses an OpAmp and is powered by dual 15 V power supplies, and which has the following characteristic at low frequencies: Vout = 3V1 - 5V2 1. State the information which is extracted from the equation.
1.explain what is the instantaneous values of AC AND phase shift angle are. Explain what the effective and average values of AC are. How are they related with amplitude. 2.Draw a calculated conductivities triangle for the circuit with a parallel co..
A carrier signal c(t) = 10 cos(2pifct) is modulated using a message signal m(t) cos(20pit). The modulation is FM, with kf = 50.Write equation for modulated signal What is average transmitted power & modulation index
Consider a causal LTI (Linear-time invariant) system described by the following differential equation: \(\frac{d^2}{dt^2}y(t) + 5\frac{d}{dt}y(t) + 6y(t) = \frac{d}{dt}x(t) + x(t)\) a) Determine the transfer function of this system.
Maximum value of frequency deviation is fixed at 75 kHz for commercial broadcasting by radio. Modulation frequency W = 15 kHz, then find the transmission bandwidth of signal and deviation ratio.
1-phase 2-winding transformer is rated 30 kVA, 360/90 V, 60 Hz. A source connected to the 360-V winding supplies an impedance load connected to the 120-V winding. The load absorbs 15 kVA at 0.8 p.f.
if Eb the energy per bit of a binary digital signal, is 10^-5 watt-sec and the one sided power spectral density of the white noise ,N0= 10^-6w/hz then what is the o/p SNR of matched filter.
Calculate the lowest 3 energy levels in a quantum well made from InAs, using the infinite potential approximation. Length of the well L = 10 nm.
A piece of n-type silicon is doped so that the majority carrier concentration is 10^15 cm^-3 What is the minority carrier concentration? (ni = 1.5 x 10^10 cm^-3) If a piece of silicon is doped with phosphorus to 10^17 cm^-3, what are the equilibrium ..
A shunt regulator utilizing a zener diode is biased on through a 100 resistor. Determine the change in the regulated output voltage for the two situations below: a) VI changes +2.0 V, ILoad constant b) ILoad changes +100 mA, VI constan..
Design a combinational circuit that can detect whether a pattern of at least three adjacent 1s occur anywhere in an 8-bit input, and that outputs a 1 in that case. The inputs are a , b, c, d, e, f, g, and h, and the output is y.
Selecting a manufaturer from the us and observing wether its annual revenues are more than one billion or not when it is known that 30% of all manufacturers have annual revenues totaling more than one billion dollars.
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