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Ge and Si diodes start conducting at 0.3 V and 0.7 respectively. In the following figure if Ge diode connection are reversed, the value of V changes by: (assume that the Ge diode has large breakdown voltage)

a.

0.6 V

b.

0.8 V

c.

0.4 V

d.

0.2 V


Question ID - 50112 | Toppr Answer

Ge and Si diodes start conducting at 0.3 V and 0.7 respectively. In the following figure if Ge diode connection are reversed, the value of V changes by: (assume that the Ge diode has large breakdown voltage)

a.

0.6 V

b.

0.8 V

c.

0.4 V

d.

0.2 V

1 Answer - 5876 Votes

3537

Answer Key : (c) -

Initially Ge & Si are both forward biased so current will effectively pass through Ge diode with a drop of  0.3V with a drop of 0.3V   if “Ge” is reversed then current will flow through “Si” diode hence an effective drop of (0.7 – 0.3) = 0.4 V is observed.



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