A resistor of resistance R and temp. coeff. of resistivity=α is connected in parallel with a resistor of resistance 3R and temp. coeff. of resistivity=2α.Find equivalent α.
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1 Answers
1use this,
since α=(1/R)(dR/dt)
1/R= 1/R1+1/R2 ,
differentiate both sides....
1/R2(dR/dt)=1/R12(dR1/dt) +1/R22(dR2/dt)
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