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Suppose that, in designing an electrical generator, we need to produce a voltage of 120V by moving a straight conductor through a uniform magnetic field of 0.5 T at a speed of 30 m/s. The conductor, its motion, and is the required length of the conductor? It turns out that in generator design, a conductor of this length is impractical, and we must use N conductors of length 0.1 m. However, by connecting the conductors in series, we can obtain the required 120 V. What is the number N of conductors needed?
What is the average power in Watts needed of a machine that cools 10 lb/minute of dry air from 20 to 15 degrees Celsius
A 2-MHz carrier is modulated by a music signal that has frequency components from 20 Hz to 8 kHz. Determine the range of frequencies generated for the upper and lower sidebands of AM signal.
In the given image, the switch S1 is in position 1 for a long time. At t=0s, the switch is thrown to position 2. Find the current i as shown in the circuit below as a function of time.
Implement a multiple mode counter
A paddle wheel within the tank is rotated until the pressure inside rises to 20 psia. During the process 20 Btu of heat is lost to the surroundings. Determine the paddle-wheel work done. Neglect the energy stored in the paddle wheel.
Apply Coulomb's law to obtain an expression for the electric field at any point P (r, 0) on the x-y plane. Show that your result reduces to the expression given by Eq. (4.33) as the length L is extended to infinity.
The transmission line has an impedance of 600 ohms and is terminated in a load of 600 ohms. The transmitter delivers an average power of 0.1 W to the input of the line.
It starts from rest at the origin. Show that it moves in a cycloidal path and drift velocity or the velocity of the center of the rolling circle along the z axis. If the electric field is 10^4 volts/cm, and the magnetic field 10^4 gausses. find th..
Two resistors are to be combined to form an equivalentresistance of 1000 Ω (or close to it). Readily available are two common resistors rated at 2000 Ω. To ensure the resistors are rated correctly, a studentmeasures the resistors using an ohmmeter an..
Find the system transfer function H(s) = Y(s)/X(s) if the input x(t) and the output y(t) of the system are related by the equation y(t) + 3y(t) = x(t) - x(tau)d tau. Assume y(0) = 0.
Consider a permanent-magnet dc motor with the following parameters: Ra=0.35Ω, La=1.5 mH, Ke=0.5 V/(rads/s), Kt= 0.5 Nm/A, and Jm= 0.02 Kg.M^2. The rated torque of this motor is 4Nm.
A linear time-invariant continuous-time system has the impulse response below: h(t) =[cos 2t + 4 sin 2t]u(t) 1. Determine the transfer function H(s) of the system. Use the Laplace transform pairs table for this. 2. Plot the system impulse response..
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