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From the given circuit diagram, what is the value of voltage across the resistor?(a) 2 V(b) 1.3 V(c) 1 V(d) 0 VThis question was addressed to me in an interview for internship.This intriguing question comes from Diode Approximations and Series Connection topic in chapter Diode Circuit of Analog Circuits

Answer»

Right option is (d) 0 V

To explain: The diodes in FORWARD BIAS, have drops of 0.3V for Ge and 0.7V for Si, and the total drops cancel out the source VOLTAGE, and hence the diode CURRENT is ZERO. Hence voltage drop is also zero.



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