Questions
The resistance R of a conductor varies with temperature as shown in Fig. 4.57. If it is written as :
detailed solution
Correct option is C
In graph R ↑ so dRdt>0 so R0α+2βt>0Also, dRdt↑so d2Rdt2>0 so R02β>0⇒β>0For all 't' α+2βt>0 so α>0Talk to our academic expert!
Similar Questions
In an electrical cable there is a single wire of radius 9 mm of copper. Its resistance is 5Ω . The cable is replaced by 6 different insulated copper wires, the radius of each wire is 3 mm . Now the total resistance of the cable will be
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