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A wound-field dc motor is driving a load whose torque requirement increases linearly with speed and reaches 5 Nm at a speed of 1,400 rpm. The armature terminal voltage is held to its rated value. At the rated Bf, the no-load speed is 1,500 rpm and the speed while driving the load is 1,400 rpm. If Bf is reduced to 0.8 times its rated value, calculate the new steady state speed.
Consider the circuit in Figure P16.73. (a) Determine the value of Y for I†=2.5V and (i) A=B=0; (ii) A=0, B=2.5V; (iii) A=2.5V, B=0;and(iv) A=B=2.5V.(b)Repeatpart(a)forφ=0.(c)Whatis the logic function implemented by the circuit
Starting from rest, a 4.70-kg block slides 2.10 m down a rough 30.0° incline. The coefficient of kinetic friction between the block and the incline is k = 0.436. (a) Determine the work done by the force of gravity.
The ALU required for this lab accepts two 4-bit inputs (A0 - A3, B0 - B3), a 3-bit function selection code (F0 - F2) and outputs a 5-bit result (S0 - S4). Since the function selection uses 3-bits, there are 8 different functions.
Calculate: a) the total charge in the device at t = 3 s, assume q(0) = 0 (round to three decimal places) b) the power consumed by the device at t = 1 s (round to three decimal places)
A signal is modulated by BPSK and transmitted over an AWGN channel. At the receiver, the bit error rate performance is 0.001
Determine the value of the constant c such that the following functions are valid probability functions: A. p(x) = cx/20, x = 1,2,3,4,5,6 and zero elswhere. B. p(x) = c(X^2 + 1), x = 1,2,3,4,5, and zero elsewhere.
The resistance of the field circuit of a shunt-excited dc generator is 200. When the output power of the generator is 100kW, the terminal voltage is 500V and the generated e.m.f is 525V.
Create the circuit to implement the state table given below. Assume that on reset, the current state will become Q1Q0 = 00 using asynchronous inputs to the flip-flops. Note that the next state and output for state 3 are don't-cares.
A circuit consists of a battery connected to three resistors (60ohm , 30ohm , and 180ohm ) in parallel. The total current through the resistors is 1.9A . Find the emf of the battery.
Find (a) the electric susceptibility of cherry-flavored Jello, (b) the permittivity of cherry-flavored Jello, and (c) the electric flux density in cherry-flavored Jello for an applied electricfield of 1 kV/m. Assume cherry-flavored Jello is line..
Efficiency in a power transformer is 98.6 percent when loaded such that its copper losses are five times its core losses. Calculate the per unit resistance of this transformer.
A metal plate is subjected to tensile stresses of sigma x = 21 ksi and sigma y = 17 ksi. The corresponding strains measured in the plate are Ex=920 µE and Ey=620µE. Determine Poisson's ration v and the elastic modulus E for the ..
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