Презентация на тему: " 0. Note to Lectures 8-9: CONDUCTORS OF 1 ST AND 2 ND TYPE Absolute temperature T Resistivity Superconductivity 0 Conductors of TYPE 1 (metals) Conductors." — Транскрипт:
0. Note to Lectures 8-9: CONDUCTORS OF 1 ST AND 2 ND TYPE Absolute temperature T Resistivity Superconductivity 0 Conductors of TYPE 1 (metals) Conductors of TYPE 2 (electrolytes, semi- conductors)
Note to Lectures 8-9: CONDUCTORS OF 2 ND TYPE Absolute temperature T Resistivity 0 Conductors of TYPE 2 (electrolytes: IONs!, semiconductors)
* Short Notes to the Lecture of April 19th Kirhhof Laws 1 & 2
Independent loops A loop that has a branch that does NOT belong to any other loop, is an INDEPENDENT CIRCUIT LOOP (contour). These three circuits are independent (any next circuit such as green shown on he next page will be dependent).
Dependent loops If all branches of a loop belong also to other loop(s), such circuit loop is a DEPENDENT CIRCUIT LOOP (thus 2 nd Kirhhoffs Law is not considered for such): Here, the circuit shown in green colour would be dependent once the black, red, and blue are considered independent.
Dependent loops The same is about 2 more dependent circuits you can guess on this scheme. In fact, ANY 3 of the 6 available here close loop circuits will be independent, but then the remaining 3 would be dependent ON THEM.
Linearly dependent equation(s) For dependent circuits there is no need to produce the 2 nd Kirhhoffs Law because it would be excessive / needless / superfluous / redundant.
As for the 1 st Kirhhoffs Law, it is necessary and sufficient to consider (N-1) nods: the Nth nod would be superfluous (excessive) to consider (gives linearly dependent – thus REDUNDANT equation).
PLAN 1.Lorentz Force. 2.Amperes MAGNETIC Force. 3.Magnetic Induction B (Tesla). Biot-Savart Law. 4.Magnetizing force H (A/m). 5.Amperes Law. 6.Magnetic Flux. 7.Magnetic Field of a Solenoid. Helmholtz coils. 8.FARADAYs LAW of INDUCTION. Lentzs Rule (Law). Motion EMF. 9.Self-induction (Inductance) L.
SERWAY, Chapter (pp. 894 – 1032). RECOMMENDED LITERATURE to the TOPIC Magnetic Field: HALLIDAY, RESNICK, WALKER Chapter (pp ).