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Two identical diodes, D1 and D2 are connected back to back as shown in figure below. The reverse saturation current I0 of each diode is 10-8 A and the breakdown voltage is 50 V. The voltage drop across diodes D1 and D2 will be respectively (assume kTlq = 25 mV)
  • a)
    4.931 V and 0.0693 V
  • b)
    0.0173 V and 4.983 V
  • c)
    0.0693 V and 4.931 V
  • d)
    4.983 V and 0.0173 V
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
Two identical diodes, D1 and D2 are connected back to back as shown in...
Diode D1 is reverse biased and diode D2 is forward biased, but as both the diodes form a close loop, the reverse saturation current flows through both the diodes.

or, 
or, V2 = VTln 2 = (25 mV) x In 2
= 25 x10-3 x 0 .693
= 17.33 mV = 0.01733 V
∴ Voltage drop across D2 is
v2 ≈ 0.0173 volt
and voltage drop across D1 is
V1 ≈ 5 - 0.0173 ≈ 4.983 volts
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Two identical diodes, D1 and D2 are connected back to back as shown in figure below. The reverse saturation current I0of each diode is 10-8 A and the breakdown voltage is 50 V. The voltage drop across diodes D1 and D2 will be respectively (assume kTlq = 25 mV)a)4.931 V and 0.0693 Vb)0.0173 V and 4.983 Vc)0.0693 V and 4.931 Vd)4.983 V and 0.0173 VCorrect answer is option 'D'. Can you explain this answer?
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Two identical diodes, D1 and D2 are connected back to back as shown in figure below. The reverse saturation current I0of each diode is 10-8 A and the breakdown voltage is 50 V. The voltage drop across diodes D1 and D2 will be respectively (assume kTlq = 25 mV)a)4.931 V and 0.0693 Vb)0.0173 V and 4.983 Vc)0.0693 V and 4.931 Vd)4.983 V and 0.0173 VCorrect answer is option 'D'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about Two identical diodes, D1 and D2 are connected back to back as shown in figure below. The reverse saturation current I0of each diode is 10-8 A and the breakdown voltage is 50 V. The voltage drop across diodes D1 and D2 will be respectively (assume kTlq = 25 mV)a)4.931 V and 0.0693 Vb)0.0173 V and 4.983 Vc)0.0693 V and 4.931 Vd)4.983 V and 0.0173 VCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Two identical diodes, D1 and D2 are connected back to back as shown in figure below. The reverse saturation current I0of each diode is 10-8 A and the breakdown voltage is 50 V. The voltage drop across diodes D1 and D2 will be respectively (assume kTlq = 25 mV)a)4.931 V and 0.0693 Vb)0.0173 V and 4.983 Vc)0.0693 V and 4.931 Vd)4.983 V and 0.0173 VCorrect answer is option 'D'. Can you explain this answer?.
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