STANDARDPhysics-Semiconductors
STANDARD Physics Diodes MCQ Question
Type: MCQ-numerical-Medium
The circuit shown in the figure contains two diodes each with a forward resistance of 30 Ω and with infinite backward resistance. If the battery is 3 V, the current through the 50 Ω resistance (in ampere) is
A
Zero
B
0.01
C
0.02
D
0.03
Correct Answer
Option C
Detailed Explanation
In the circuit, the upper diode D₁ is reverse biased and the lower diode D₂ is forward biased. Thus, there will be no current across the upper diode junction. The effective circuit will be as shown in the figure. Total resistance of the circuit, R = 50 + 70 + 30 = 150 Ω. Current in the circuit, I = V/R = 3V/150Ω = 0.02 A.
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