Can coils be assumed to be resitive only under steady state dc conditions? Explain why (Experiment:...
1. Is there direct contact between the primary and secondary coils in a transformer? 2. Why does the coil in a DC motor turn? Compare that to the means by which a generator produces current 3. Why are only a few types of atoms (iron, for example) magnetic?
4. Determine i and v 4. Under the steady-state DC conditions, find i and v in the following circuit. I amH m- SMA 6 33ok" v — Згол
1. For the circuit shown, find Vc under DC steady state conditions. ic = C4046, v. = L di(t) dt 112 522 m 12 V ( + vc +1F
Problem 5 (20%)-A Boost dc-dc converter is operating in DC steady state under the following condition: 玲= 4V, pO = 10V, Po = 40W and f, = 200kHz . The value of the inductor is selected such as that under these operating conditions, the peak-to-peak ripple Δ, 2.4. What is the value of the inductance L in uH ? Please provide your answer with calculation in details.
In a Buck-Boost converter, \(L=25 \mu \mathrm{H}\). It is operating in dc steady state under the following conditions: \(V_{i n}=12 \mathrm{~V}, D\) \(=0.6, P_{o}=36 \mathrm{~W}\), and \(f_{s}=400 \mathrm{kHz}\). Assume ideal components.In this Buck-Boost converter, the output load is changing. Calculate the critical value of the output load \(P_{o}\) below which the converter will enter the discontinuous conduction mode of operation.(a) Calculate \(I_{\text {L.crit }}\) and \(I_{o, \text { crit }}\)(b) Calculate \(P_{o, \text { crit }}\)
Given a unique base model, state and explain all possible experimental conditions under which the model is assumed to accurately represent the behavior of a real system
1. An n-type silicon bar of length L is maintained under steady state conditions such that δpn(0)-6pno-1012/cm3 and δpn(L)-0. The Si bar is uniformly doped with N.-1016/cm3 at room temperature. No other photo-generation of processes occurring inside the bar. a) Do low level injection conditions prevail? Explain b) Show the variation of minority carrier concentration with respect to x. c) How much is n(x)? d) What is the position of the quasi-Fermi level inside the bar at (i) x-0, and...
1. A conducting ring is falling toward a bar magnet as shown in the figure above. Explain why there will be a repulsive force between the ring and a magnet. 2. A respiration detector can prevent infant sudden death syndrome by sounding an alarm when the infant stops breathing. The detector consists a coil placed on the person’s chest and another on the person’s back. There is a constant current in one coil, but not in the other. Explain how...
1. Magnetic Field Generated by a Current in a Wire Under steady-state conditions, a magnetic field B has curlB in a region where there is no current. We study the steady-state magnetic field B due to a constant current in an infinitely long straight thin wire. The magnitude of the magnetic field at a point depends only on the distance from the wire and its direction is tangent to the circle around the wire and determined by the right-hand rule....
1. Is the power supply for a transformer AC or DC? Explain in detail why only this type of power supply will work. 2. Some configurations with the iron core have low efficiency while others have high efficiency. What is the iron core doing to cause this? Be specific. (Hint: think about how a transformer works.) 3. For an ideal transformer the energy must be conserved, so the average power (P=IV) in the two circuits must be equal. Therefore, if...