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Q. Consider the magnetic circuit shown in Figure. Assume the relative permeability of the magnetic material to be 1000 and the cross-sectional area to be the same throughout. Determine the current needed in the coil to produce a flux density of 1 T in the center limb, if the excitation coil has 500 turns.
Critical Rate of Rise of Current The maximum rate of increase of current during on state which the SCR can tolerate is called the critical rate of rise of current f
PLC ( Programmable Logical Controller ) PLC stand for programmable logical controller. PLC is an industrial computer used to monitor inputs and depending upon their m
What is a microcomputer? A computer that is designed using a microprocessor as its CPU is known as microcomputer
Q A wire with n = 10 30 electrons/m 3 has an area of cross section A = 1mm 2 and carries a current i = 50 mA. Compute the number of electrons that pass a given point in 1 s, and
Refer to the op amp circuit shown below. Let R 1 = 140 k_, R 2 = 10 k_, R 3 = 10 k_, R 4 = 20 k_, RL = 10 k_. Assume the op amp is ideal. Find the equation relating the
Illustrate the construction and working of:- (i) Pressure Thermometer (ii) Selective Radiation Pyrometer (iii) Thermistor (iv) Laws of Thermocouple
Consider the common-emitter BJT circuit shown in Figure (a). The static characteristics of the npn silicon BJT are given in Figure (b) along with the load line. Calculate iB for v
Q. A magnetic circuit is found to have an ac hysteresis loss of 10 W when the peak current is Im = 2 A. Assuming the exponent of Bm to be 1.5, estimate Ph for Im = 0.5A and 8A.
Application of Microprocessors Microprocessor microcontroller based systems may be used in almost every filed of life and their applications are increasing day by day
A 6-pole armature has 1000 conductors and a flux per pole of 40mWb. Determine the e.m.f. generated when running at 600 rev/min when (a) lap wound (b) wave wound.
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