Question

If the voltage applied to a diode having forward bias resistance of 1 $\Omega$ is changed from 0.6 V to 0.9 V, the change in current in it is

• A. 300 mA
• B. 250 mA
• C. 400 mA
• D. 450 mA
• E. 750 mA

Hint:

$1 \text{ A} = 1000 \text{ mA}$.

Answer 1

The Correct Option is A

Step 1: Concept
From Ohm's law, change in current $\Delta I = \frac{\Delta V}{R_f}$.

Step 2: Meaning
$\Delta V = 0.9 \text{ V} - 0.6 \text{ V} = 0.3 \text{ V}$. Resistance $R_f = 1 \Omega$.

Step 3: Analysis
$\Delta I = \frac{0.3}{1} = 0.3 \text{ A}$.

Step 4: Conclusion
$0.3 \text{ A} = 300 \text{ mA}$.
Final Answer: (A)