Chandrayan 1 the lunar mission launched by India in 2008 had all gold wiring A...
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Chandrayan 1 the lunar mission launched by India in 2008 had all gold wiring A particular instrument on board the mission was operating at the same temperature as the space surrounding the Chandrayan at 3 K Instrument specifications demanded that no wire in the instrument should offer a resistance more than 7 m2 All the instruments on Chandrayan were fabricated in ISRO lab at room temperature of 30 C If the radius of all wires in the instrument was 0 1 mm as measured in ISRO lab If the maximum allowable length as measured in ISRO 22 lab of any wire is approximately meter then find 1 Take 1 Assume that resistivity and length of gold wire change linearly with temperature You can use these properties of gold Resistivity at room temperature p 2 2 x 10 m Temperature coefficient of resistivity 0 0032 K Linear thermal expansion coefficient g 1 5 x 10 K
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