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Explain the effect of temperature on the resistivity of conducting materials.
The resistance of most metals rises with rise of temperature whereas that of semiconductors and electrolytes reduces along with increase of temperature. Various metals have vanishing resistivity at absolute zero of temperature. This phenomenon is termed as superconductivity. The resistance of a conductor changes along with temperature according to the law Rt = RO (1 + α t). Here Rt and RO are the resistances at "t" and zero degrees centigrade and α the temperature coefficient of resistance.
Semiconductor in Equilibrium Equilibrium in semiconductors implies the following: (i) Steady state: ∂Z / ∂t = 0 In which Z is any physical quantity like charge, volt
Q. Show Quantization process Let Figure (a) illustrate a message f (t) with values between 0 and 7 V. A sequence of exact samples taken at uniform intervals of time is shown: 1
Define Sampling Frequency? Since real analog signals consist of several frequencies, spectrum of the input signals should be limited to make sure that no signal energy exists a
Data analysis in GIS: Therefore, GIS consists of the following: 1. Database - for storage and retrieval of information. The database forms the foundation of the GIS syst
Hi, I got assignment to design a power electronic system Design the circuit and select the appropriate components for that circuit to fulfil the requirements of the device. Regards
The circuit is altered by replacing the capacitor, C1 with an inductor of 150mH and left with the switch in position (a) for a long time. At time t=0, the switch is moved from posi
What is the power of the signal transmitted by powerful cell phones? Ans) The powerful cell phones can transfer a signal of 3 watts.
(a) contains a freewheeling diode Dm, commonly connected across an inductive load to provide a path for the current in the inductive load when the switch S is opened after time t (
short note on thermal runaway
(a) What is understand by clipping circuit. Draw and illustrate different types of diode clipping circuits? (b) With the help of circuit diagram describe the working of centre t
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