Q. The current voltage relation of diode is given by , where the applied voltage is in volt and the temperature is in kelvin. If a student makes an error measuring while measuring the current of at , what will be the error in the value of current in ?

 2409  215 JEE MainJEE Main 2015Physical World, Units and Measurements Report Error

Solution:

Given,

So,

Taking log on both sides, we get
On differentiating,


So, error in the value of current is .