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a 230-V shunt motor, having an armature resistance of 0.05 and a filed resistance of 75, draws a line current of 7 A while running light at 1120 rpm. the line current at a given load is 46 A. determine
a) the motor speed at the given load,
b) motor efficiency, and
c) total core and mechanical losses.
In an electroplating process, copper (ionic charge +2e, atomic weight 63.6 g/mol) is deposited using a current of 10.0 A. What mass of copper is deposited in 10.0 minutes. Avogadro's number is 6.022 × 1023 molecules/mol and e = 1.60 × 10-19 C.
Design a circuit that implements the logic function "f = A' + B" using only two single pole/single throw switches, an LED, and a current limiting resistor.
An inventor claims to have perfected an engine that wil produce power from energy transferred as heat from a 1000K flame. Energy wil be rejected as heat to the ground at 290 K. A 75 percent energy conversion efficiency is claimed.
A 6-pole, wave-connected dc armature has 300 conductors and runs at 1200 rpm. The emf generated is 600 V. Find the useful flux/pole.
The paired measurements were collected on the same day within 30 minutes of one another; the data are given in the accompanying table. Construct a 95% confidence interval for the difference in mean number of negative interactions.
Each player has 8 switches that have a value of 0 to 7 and the game has a 3-bit counter that will generate a random number between 0 and 7. The player that can come as close a possible to the random number
From a large lot of new tires, n tires are to be sampled by a potential buyer, and the number of defectives X is to be observed. If at least one defective is observed in the sample of n tires, the entire lot is to be rejected by the potential buye..
Write a C++ function which initializes its three reference parameters. The function should take an int, double, and string parameter and initialize them to 0 and the empty string ("").
Given the following function: F(W,X,Y,Z) = fm(2,3,5,7,12,13). a. Implement the function using an 8-input multiplexer. b. Implement the function using a 4-input multiplexer.
A 4-pole, 50 Hz scharg motor, running at no-load, gives minimum and maximum speeds of 500 and 2500 r.p.m. respectively, for brush separation of 180 electrical degree (i.e. one pole pitch).
Should managers inform employees that their Web behavior is being monitored? Or should managers monitor secretly? Why or why not?
The output of the power supply should be a 5 Vdc with no more the 5 mV peak-peak ripple. 3) The output must be galvanically (transformer) isolated from the input, but NO 60 Hz transformers are to be used. 4) The load can be assumed purely resistiv..
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