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JEE Mains · Physics · STD 12 - Semicondutor electronics
  • JEE Mains 2014
  • Medium
  • MCQ

The current voltage relation of a 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 \(±0.01\ V\) while measuring the current of \(5\ mA\) at \(300\ K\), what will be the error in the value of current in \(mA?\)

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Answer & Solution

Correct Answer

(D) \(0.2\)

Step-by-step Solution

Detailed explanation

The current voltage relation of diode is

\(I=\left(e^{1000 V / T}-1\right) \mathrm{mA}(\text { given })\)

When, \(I=5 m A, e^{1000 V / T}=6 m A\)

Also, \(d I=\left(e^{1000\, v / T}\right) \times \frac{1000}{T}\)

(By exponential function)

\(=(6\, m A) \times \frac{1000}{300} \times(0.01)\)

\(=0.2\, \mathrm{mA}\)

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