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A motor with an efficiency of 76% supplies 20 hp to a load.It's power factor is 0.6 (lagging). A voltage of 440 VAC (RMS), 60Hz is applied to the motor.a. What is the real power applied to the motor in Watts?b. What is the reactive power applied to the motor inVARs?c. What is the apparent power applied to the motor in VAs(Draw the power triangle)?
Given one has frequency response of a system (magnitude and phase), and a sine wave of a given frequency and phase is input, explain how to find the output.
Discuss different applications that could use non-inverting and inverting amplifier circuits. Will the actual op Amp characteristics cause any challenges it used for each application.
A 20kg of aluminum block initially at 80C is dropped into an insulated tank that contains 120 liter of water at 25C. Determine the final equilibrium temperature and the total entropy change for this process.
a) Draw a sketch of the spectrum of x(t) = sin3(400πt) Label the frequencies and complex amplitudes of each component. Determine the minimum sampling rate that can be used to sample x(t) without aliasing for any its components.
Name the basic techniques popular for ADC's, more specifically the quantization or digitization techniques. Mention the techniques in the order of slower to faster systems.
n electrical heater is connected to a constant 250-V sourceand absorbs 1000W. Subsequently, the heater is connected to a constant 220-Vsource. What power does it absorb from the 220-V source. What is the resistance of the heate.
A parallel RLC circuit is constructed using a 1 mH inductor anda 12 μF capacitor. a) Select R such that the circuit response is critically damped. b) If vC(0-) = 12 V and iL(0-) = 0 A, find an expression for vC(t)value for t > 0 s.
A platinum resistance coil has a resistance at O0 C of 100 . Determine the change in resistance that will occur when the temperature rises to 30°C if the temperature coefficient of resistance is 0.0039 K-1.
Consider a diode biased at 1 mA. Find the change in current as a result of a changing the voltage by (a) -10 mV, (b) -5 mV, (c) +5mV, (d), +10mV. In each case, do the calculations (i) using the small-signal model and (ii) exponential model.
Determine the hysteresis loss if the apparatus isconnected to a 60 Hz source whose voltage is such as to cause theflux density to be 62 percent of it's rated value. Assume that theSteinmetz exponent is 1.4.
A CG amplifier when fed with a signal source having Rsig = 200 ohms is found to have an overall voltage gain of 10V/V. When a 200 ohm resistance is added in series with the signal generator the overall voltage gain decreased to 8V/V.
When using current mirrors as current amplifiers, a dc current source is often included on both the input side and the output side of the current mirror. What is the purpose of these dc current sources
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