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A rectangular chip has a top surface of 0.5 cm by 2 cm cooled by air at 20 oC with h = 150 W/m2.K. There are also 16 connector pins, 1 mm wide, 0.5 mm thick, 6 mm long and k = 60 W/m.K attached to a circuit board at 30 oC. If the surface temperature of the chip is not to exceed 80 oC, determine
a. The power dissipated by the top surface of the chip
b. The power dissipated by the pins
c. The total power dissipated
Need the coding for the circuits and its a intelligent fan controller based on temperature?
The potentiometer is designed to rotate 330 degrees to give the full range of possible resistance. However, the actual measurement range that is used is only 165 degrees indicating positions of a liquid sensor float ranging from 0 to 10 cm (empty ..
Do either or both of the reasons you gave in part (a) above also apply to a point to point voice link using frequency modulation? c. Which parameter of an FM transmission determines whether it is wideband or narrow band?
A circular loop TV antenna with 0.01 m2 area is in the presence of a uniform -amplitude 300 MHz signal. When oriented for maximum response, the loop develops an emf with a peak value of 20 mV. What is the peak magnitude of B of the incident wave?
(a) Determine a unit vector in the direction of Q at P(1, 2, 1) (b) Find the component of Q at P in the direction of PT where T is point (5, 3, -4) (c) Where is Q the same as the unit vector of \(a_{x}+11a_{y}+10a_{z}\)
Explain the structure and nature of the ionosphere with reference to daily, seasonal and long-term changes and explain the modes of propagation of radio waves of different frequencies
a plane wave is obliquely incident onto the planar interface between mismatched, lossless, nonmagnetic, uniform media, yet undergoes no reflection. If incidence is at 54 degrees to the normal, at what angle to the normal does the transmitted wave ..
There are two four bit messages, 1010 and 1110. The first one is appended with an odd parity bit, the second one with an even parity bit. What are the values of the parity bits for the first and second messages respectively.
A majority function is generated in a combinational circuit when the output is equal to 1 if the input variables have more 1's than 0's. The output is 0 otherwise. Design a 3-input (A, B, C) majority function. Use K-maps to simplify the circuit. D..
Analysis of link budget DTH QPSK Satellite link, A direct-to-home satellite television system uses a geostationary satellite in orbit above the equator at a longitude of 109 degrees west.
Simple in concept, but complicated in execution because of the resulting integrand: Explicitly evaluate (in Cartesian coordinates) the surface integral (flux) over the surface S defined as the face of the cube that is perpendicular
What annual revenue is required to cover fixed costs? What will be the annual variable costs? How much will electricity cost per kWh?
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