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Derive the mathematical 3-D heat conduction equation in Spherical Coordinates?
A furnace is made up of three layers of thicknesses 250 mm, 150 mm nad 100 mm with thermal conductivities 1.65, k, 9.2 W/m ºC respectively. The inside is exposed to gases at 1250 ºC with a convection coefficient of 25W/m2 ºC and the inside surface is at 1100 ºC, the outside surface is exposed to air at 25 ºC with convection coefficient of 12W/m2 ºC. calculate:
i. The unknown thermal conductivity (k);
ii. The overall heat transfer coefficient;
iii. All surface temperatures.
Discuss electrical properties of insulating materials. Electrical properties of an insulating material are As Follows: Insulation resistance - It is the property, through
explain 4-bit comparator
Q. Consider the 4-bit R-2R ladder D/A converter with V ref =-10 V. Determine the analog output voltage when the binary input code is 1100. Also, find what reference voltage is to
Question: (a) A typical RF filter is made up of sections using circuit components. One example of a section is the Inductor-Capacitor (L-C) section. State two other types of
Consider a forward-biased diode with a load resistance. Let the static volt-ampere characteristic of the diode be given by Equations, and typically represented by Figure. (a) Fo
Active-mode PNP transistors in circuits: In the figure, the arrows showing current point in the direction of conventional current - the flow of electrons is in the opposite di
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
Q. Define wireless communications? The latest wireless communications technology is the personal satellite phone. The coverage is planetary and one can reach anywhere on earth.
function of a commutator in a DC motor
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