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Two junction diodes one of germanium (Ge...

Two junction diodes one of germanium (Ge) and other of silicon (Si) are connected as shown in fig to a battery of e.m.f. 12 V and a load resistance `10kOmega` The germanium diode conducts at 0.3V and silicon diode at 0.7 V When a current flows in the circuit , the potential of terminal Y will be :

A

12 V

B

11 V

C

11.3 V

D

11.7 V

Text Solution

Verified by Experts

The correct Answer is:
C
Ge is at 0.3 V and Si at 0.7 V .
Both Ge and Si didoes are in parallel When current flows, P.D. remains at 0.3 V, so no current flows through Si - diode.
P.D. across `R_L=12-0.7 =11.3V`
`:.` Potential at `Y = 11.3V`
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