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he windings of a large electromagnet have an inductance of 10.0 H and a resistance of 8.00 Ohm. The electromagnet is connected to the external EMF of 230 V. After electromagnet is switched on
(a) if there is no current in the loop, what is the magnetic flux through the coil (b) When the current in the coil is 3.8 A in certain direction, the net flux through the coil is found to vanish. W
Two circular poles of the electromagnet, facing each other, both have a radius of R=0.1 m. The electromagnet is suddenly disconnected from its power source, and magnetic field decreases at a r
A 2-pole, 3 phase (PMAC) brushless-dc motor drive with a torque constant Kt and the voltage constant Ke being 0.5 in MKS units and the synchronous inductance is 15 mH and supplying a torque load TL
If 50.0 cm of copper wire (diameter 1.00 mm) is formed into a single circular loop and placed perpendicular to the uniform magnetic field that is increasing at a constant rate of 10.0 mT/s, at what
The 1 m long wire is oriented perpendicularly to the infinitely long wire, and the end closer to the infinitely long wire is located 0.5 m from it. Find the induced EMF. Hint: solving the problem re
A very long, tightly-wound solenoid has a circular cross section of radius r = 2.6 cm . The magnetic field outside the solenoid is negligible. Throughout the inside of the solenoid the magnetic fiel
Design a combinational circuit that detects an error in the representation of decimal digit in Excess-3. The output of the circuit must be equal to logic-1 when the inputs contain any one of the six i
A 1/10hp motor has a 1000 rpms with 20v across the armature and series winding there are three speed control switches. The motor speed decreases linearly what are the four speeds available if each r
Write a program that accepts a date from the user in the form mm/dd/yyyy and then displays it in the form month dd, yyyy, where month is the written name of the month. Store the month names in an ar
A constant current I is flowing in a semi infinite loop. Find magnetic field intensity at the origin: H(0,0,0). Use magnetic field intenisty for a piece of wire.
Consider putting down a metal electrode with a 4.50 eV work function on a piece of Ge which has an electron affinity of 4.00 eV, an intrinsic carrier concentration at 300K of 2.5 x 1013/cm3, and tha
If a seventh-order system has a row of zeros at s^3 and two sign changes below the s^4 row, how many jw poles does the system have
A parking meter accepts only quarters, which are worth one half hour each. A car may park at the meter for a maximum of 90 minutes; and the meter does not give change- quarters beyond 90 minutes are
1. An operator prepares an 8-bit binary value with a dip switch. 2. A momentary contact switch (single-pole-single throw) connected to only one end of a cross-coupled NAND latch is activated. This s
What will the interest charges be if she elects the 24-month plan and find the periodic payment R required to amortize a loan of P dollars
A DC voltmeter is rated at 14 bits of resolution and has a full-scale input range of ±5V. Assuming the meter's ADC is ideal, what is the maximum quantization error that we can expect from the
Consider a circuit consisting of a voltage source in series with a 1-Henry inductor and a 0.25-Farad capacitor. Assume all initial conditions are 0. Compute and plot the capacitor voltage vc(t) for
Design combination circuits that generates the -ve of a give 4-bit +v signed number, e.g. if it is +2 the circuit will generate -2 and if it is -2 the circuit will not change it. assuming that the s
How a capacitor filter up the noise, explain using logic thinking perspective method. Not using the formula to explain. (Explanation should suitable for newbie to understand)
A two-wire air line has the following line parameters: R = 0.404 (m/m), L= 2.0(µH/m),G= 0, and C= 5.56 (pF/m). For operation at 5 kHz, determine (a) the attenuation constant a,(b)the phase con
A speaker can be modeled as an inductor LS (the coil that generates the magnetic field to move the speaker diaphragm) in series with a resistor RS (resistance associated with the coil wire, as well
A strictly convex function is defined as one for which every chord lies above the function. Show that this is equivalent to the condition that the second derivative of the function be positive.
a) Using 10 nF capacitors and ideal op amps, PROBLEM design a high-pass unity-gain Butterworth filter with a cutoff frequency of 2 kHz and a gain of no more than -48 dB at 500 Hz. b) Draw a circuit
In polysilicon emitters, heavily doped polysilicon forms the contact to the emitter. The minority density does not go to zero at the polysilicon contact, but decreases to zero well inside it. This a