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The entire device is made of sheet steel. The coil has 2,000 turns. The armature is stationary so that the length of the air gaps, g=10mm, is fixed. A direct current passing through the coil produces flux density of 1.2 T in the gaps. assumeπr=4,000 for sheet steel. Determinea. The coil current.b. The energy stored in the air gaps.c. the energy stored in the steel.
in a balanced three-phase wye system the source is an abc-sequence set of voltage. the load voltage on the a phase is Van= 108.58
A three-phase fault occurs at the generator terminals causing the angle of part (c) to increase. The fault is subsequently cleared. Find the maximum value that this angle can reach during the fault (i.e. the critical clearing angle) so that the ge..
1-why placement of grounds is significant to obtaining accurate measurements when using instruments that can be grounded, such as scopes and 2) why should we never connect a DMM that is set up to measure current across a voltage supply
Binary data is transmitted through an Additive White Gaussian Noise (AWGN) channel with SNR=3.5 dB and bandwidth B. Channel coding is used to ensure reliable communications. Then: i. What is the maximum bit rate that can be transmitted
What is the purpose of core in hollow solder wire What is tinning, and why is it important Why is safety so important when soldering Why has lead-free solder replaced lead-based solder
Design an interface for a 12 V, 500 mA bipolar stepper motor. There are 200 steps per revolution. Write software to spin the motor at 1 rps.
Give three advantages of a three-phase system over a single-phase system There are two basic three-phase connections, the wye connection and the delta connection. Draw a labelled diagram showing the wye connection
Main Memory size is 256K words, Cache size is 16K words block size is 32 bytes Show the mapping in terms of tag, index and block offset for direct map, 4 way set associative, fully associative
(a) If five different types of chips are to be placed on the board, how many different layouts are possible (b) If the five chips that are placed on the board are of the same type, how many different layouts are possible
The amplifier has a Thévenin voltage of 25[Vrms], and a Thévenin resistance of 0.275[O]. Find the turns ratio for the transformer, so that the maximum possible power is delivered to the speaker.
1. Derive the sensitivity for a voltage and current source excited Wheatstone bridge. 2. Show the balance condition for a Wheatstone bridge is also true in the sinusoidal steady state if the resistances are replaced with complex impedances.
A typical method of measuring the linearity of an amplifier is called the "Two-tone" test. Signals at f1 and f2 are input to the amplifier and the output spectrum is observed. Assuming that signals at 14.1 and 14.2 MHz are input to an amplifier.
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