A diode having potential difference 0.5 V across its junction which does not depend on current, is connected in series with a resistance of 20 Ω across a source. If 0.1 A current passes through the resistor, the voltage across the source is:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 2.5 V
Using Ohm's law,
$V_R=I.R$
$=0.1A×20Ω=2V$
The total voltage supplied across the source is,
$V_{source}=Voltage diode ($V_D$) + Voltage Resistor ($V_R$)
$=(0.5+2)$
$=2.5V$