Question 78 of 209

A $5V$ battery is connected across the points $X$ and $Y$. Assume ${D}_{1}$ and ${D}_{2}$ to be normal silicon diodes. Find the current supplied by the battery if the $+ve$ terminal of the battery is connected to point $X$.

A$~0.86A$B$~0.5A$C$~1.5A$D$~0.43A$

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Answer: (D) $~0.43A$

Here only ${D}_{1}$ will work and we know for silicon diode, potential drop on ${D}_{1}$ will be $0.7V$
$I=\dfrac{5-0.7}{10}=0.43A$