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1. A balanced, three-phase 240-V source supplies a balanced three-phase load. If the line current IA is measured to be 5 A, and is in phase with the line-to-line voltage VBC, find the per phase load impedance if the load is
(a) Y-connected, and
(b) ?-connected.
2. Two balanced Y-connected loads, one drawing 20 kW at 0.8 p.f. lagging and the other 30 kW at 0.9 p.f. leading, are connected in parallel and supplied by a balanced three-phase Y-connected, 480-V source. Determine the impedance per phase of each load and the source currents.
A nonconducting sphere has radius R=2.31cm and uniformly distributed charge q = +3.50fC. Take the electric potential at the sphere's center to be Vo = 0.
For either the original system or its transpose, determine the difference equation relating the input x[n] to the output y[n]. (Note: The difference equations will be the same for both structures.)
obtain the rotational losses of a universal motor if you are only given the impedance, RPM, voltage,poles, frequency, current and pf Basically I need to solve for the shaft torque and efficiency but can't get my Pout value without the rotational l..
Determine the amount of time that the following devices would have to be used before 1.0x106 C (1 million Coulombs) of charge passes through them. a. LED night light (I=0.0042 A) b. Incandescent night light (I=0.068 A)
compute the amplitude spectrum, phase spectrum, and power spectrum using the
an astronaut drops an object from rest relative to the planet on a planet alpha having the same radius as of earth
Design a multi-stage audio amplifier for delivering an average power of 400 mW to a 16 Ohm speaker from a microphone that produces a 10 mV peak sinusoidal signal and has a source resistance of 1 kW. Use standard NPN QN2222 for your design.
design a sequential circuit that continuously computes the function 2X + 3 or 3X + 1 where the variable X is a three-bit unsigned integer available on a serial interface. A special external data signal (DATA_READY) is asserted
A volume is divided into two equal parts by a partition. The left volume has N atoms. The atoms have a mass m. A hole of area A is made in the partition at time t=0 A)Develop an expression for the number of white atoms on each side of the partition..
A plant has two identical standby generator units for emergency power use. In the area of the generators, the normal noise level registers 81 dBA on the sound-level meter with the generators turned off. When one generator switches on, the noise le..
Find steady-state error to the unit ramp input. If it is greater than 0.1, design a lag compensator that helps to achieve the steady-state error (to the unit ramp input) no more than 0.1. (Hint: Use Matlab to nd the dominant closed-loop poles.)
the cross-section of a rectangular capacitor is shown below. it consists of a 12mm by 12mm conducting strip shielded by a 20 mm by 20mm rectangular conductor and separated by air. using the finite difference method,
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