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Under no-load conditions, a certain motor operates at 1200 rpm with an armature current of 0.5Aand a terminal voltage of 480V. The armature resistance is 2Ω.Determine the speed and speed regulation if a load demanding a torque of 50 Nm is connected to the motor. Assume that the losses consist solely of heating of RA and frictional loss torque that is independent of speed.
For a face centered cubic, the volume of a conventional unit cell is a^3 Find the volume of a fcc primitive unit cell with three basis vectors: (0,0,0 --> a/2,0,a/2) and (0,0,0 --> a/2,a/2,0), and (0,0,0 --> 0,a/2,a/2)
a spring has a natural length of 26 cm. if a 26 n force is required to keep it stretched to a length of 30 cm how
A periodic sequence x[n] with a period N is applied as an input toan Linear Time Invariant discrete-time system characterized by an impulse response h[n] generating an output y[n]. Is y[n] a period sequence If it is, what is its period?
Three identical single-phase transformers, each rated at 100 kVA, 7 kV/3.5 kV, are connected as a three-phase transformer bank. The high-voltage side of the transformer is connected in delta and the low-voltage side is connected in wye.
A copper wire has a diameter of 2.05 mm and carries a current of 5 A due solely to electrons. (these values are common in residential wiring.) Each electron is has a charge of of -1.6 × 10-19 C.
The weather is bright and there are no dark clouds in the sky. I decide to take a walk in Montrose Water Sports Park, which is just a short distance from where I reside. I come to this decision because it is a Saturday afternoon, and I am feeling bor..
For Laboratory Application Assignment on pgs. 166-167 examine Fig. 5-38.Perform calculations for:I1 (current through R1)I2 (current through R2)I3 (current through R3)
Derive the state space quation of a DC motor with supply voltage and load torque as inputs and armature current, angular speed as outputs.
Determine the potential drop across the depletion region and thus explain why it is appropriate to make the assumption that the quasi Fermi levels are constant across the depletion region.
Explain clearly what do you understand by super charging. How is it achieved? What is the effect of super charging on the folloing parameters: 1. Power output 2. Mechanical efficiency and 3. Fuel Consumption.
A plant expansion is planned in which 4 morelarge 4-kV motors must be added to the system. The current switch gear can not supply all 10 motors, because both the switch gear bus rating and the transformer rating would be exceeded.
Suppose a certain causal signal f(t) has a Laplace transform F(s) = 1. If f(t) is sampled at times kT where T is a constant time interval and integer k>=0, what are the sample values
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