Correct Answer - Option 1 : 0.47 V

**Concept:**

For the forward-biased P – N junction, as the temperature increases the forward voltage decreases by 2.5 mV/°C which can be written as

\(\frac{{dv}}{{dt}} = - 2.5\;mV/^\circ C\)

**Calculation****:**

Given, T_{1} = 25°C and T_{2} = 75°C

For (75 - 25)°C increase in temperature,

The voltage will decrease by 2.5 × 50 = 125 mV

The voltage across the diode is 600 mV - 125 mV = 475 mV

= 0.475 V