1.

The current voltage relation of diode is given by I=(e^(1000V//T)-1) mA , where the applied voltage V is in volts and the temperature T is in degree Kelvin . If a student makes an error measuring pm0.01 V while measuring the current of 5 mA at 300K, what will be the error in the error in the value of current in mA ?

Answer»

0.5 mA
0.05 mA
0.2 mA
0.02 mA

Solution :`5 = e^(100 (V)/(T))-1`
`impliese^(1000V/T=6)""....(1)`
Again , `I=e^(1000V/T)-1`
`(dI)/(DV)=e^((1000V)/T)1000/T`
`dI=1000/Te^(1000/TV)dV`
Using (1) , `DeltaI=100/Txx6xx0.01`
`=60/T=60/(300)=0.2mA`
So correct choice is (C) .


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