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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.
A closed magnetic circuit of cast steel having a 6cm long path of cross-sectional area 1cm 2 and a 2 cm path of cross-sectional area 0.5 cm 2 . A coil of 200 turns is wound around
Q. Consider the inverting integrator circuit shown in Figure. Let C = 0.4µF and R = 0.1M. Sketch v o for a period of 0.5 s after the application of a constant input of 2 V at the
Name the materials used in case of Bimetals and give reasons. Bimetals : Alloy of nickel and iron along with low value of coefficient of thermal expansion are utilized as
Compare MOSFET with JEFT ? a. In enhancement and depletion types of MOSFET, the transverse electric field induced across an insulating layer deposited on the semiconductor mate
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.
Low Voltage at Transformers While the voltage applied to induction motor varies from the rated voltage, its performance is affected. Against permissible voltage variation of
I need help to build a circuit diagram for home energy management.It includes load controllers,a central system in which we should programme all of the control commands,and a two w
In this case, 24 simultaneous calls can be put through switch. Generally a 24-outlet Uni-selector is used as a selector hunter. Every one of the 24 outlets is connected to one two-
Q. Explain Multiplexing Systems? A multiplexing system is one in which two or more signals are transmitted jointly over the same transmission channel. There are two commonly us
Q. Explain Common Emitter Circuit With The Help Of A Circuit Diagram? Most transistor circuits have the emitter,rather than the base,as the terminalcommon to both input and out
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