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Consider the device like a primitive relay. The armature on the right would be guided and aligned with the core on the left. A return spring would be used to pull the armature back to the right once the coil is de-energized. The springs effect is addressed below. As a relay some contacts are connected to, and move with, the armature. Other contacts are stationary and would make or break contacts as the armature moves. The following characteristic re given: Core and armature material = cast steel, us Fig 1-5(b), pg. 3. N = 500 turns Mean core path through the core and armature = 360mm Each air gap between core and armature = 1.5mm With the given airgap, a flux density B = 0.8T is required to move the armature and actuate the relay. This is required to overcome the spring. Determine: (a) Find the current in the coil. Hint: the air gap is so small, fringing is negligible. (b) What is the permeability of the relay's magnetic circuit, m, assuming (a). (c) Repeat the problem with the air gaps zero. Find the new current necessary to maintain B = 0.8T.
To digitally manipulate information we must encode it using binary numbers. Consider an encoding for playing cards. There are 52 cards in a deck and they are divided
A selective-repeat (SR) data link layer protocol uses 4 sequence bits to number it's frames. The source, C starts from frame 0 and proceeds following the Sr protocol. Let us start analyzing the frame/ACK transmissions when the first outstanding fr..
Restricting yourself to nondegenerate dopings and also requiring the resistance to be readily measured with a hand-held multimeter (say 1 R 1000), what is the range of doping Pick a doping concentration in the mid range.
We need to use asynchronous TDM and combine 50 digital sources. On average only 20% of the sources are active at any time. Each output slot carries 18 bits of data from each digital source. Also 8 extra bits are added to each frame for synchroniza..
HCI is a polar molecule, with a dipole moment of 3.44 X 10^-30 [C.m] per molecule. If it is known that the molecular bond distance is 0.136[nm], find the magnitude of the net displaced charge in each molecule.
The forward-bias current in a GaAs pn-junction at T = 300 K is ID = 15 mA. The reverse-saturation current is IS = 10^-19 A. Determine the required forward-bias diode voltage.
How is the problem-solving process different when programming in assembly language versus programming in ladder logic?
A student project is required to be portable and hand held. It requires 6 V DC power at a current of 150 mA. The batteries for the power supply must last for a minimum of 7 hours of continuous operation.
The simple inexpensive hydro turbo-generator (turbine mated with electric generator) that you intend to buy has a working efficiency of 60%. Answer the following (show your work).
Four frequencies are applied at the input of a non-linear amplifier. Write down all of the frequency components at the output of the non-linear device. Write down only the first three harmonics.
Based on these equations, determine the maximum power point. This is the value of and T that result in maximum power. State the power and the (,T) values. Do not assume this happens at 0.5T. The best way to do this is to make an Excel spreadsheet.
suppose we use a 32-bit unsigned fixed-point representation with the binary point to the left of the most-significant bit of the 32-bit number. (We'll have a range of 0 - almost 1.) What is the resolution of this representation
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