The circuit shown in the figure contains two diodes each with a forward resistance of 30 `Omega` and with infinite backward resistance. If the battery is 3 V, the current through the 50 `Omega` resistance (in ampere) is

Options

A. Zero
B. 0.01
C. 0.02
D. 0.03

Answer

C

Explanation

In the circuit, the upper diode `D_(1)` is reverse biased and the lower diode `D_(2)` is forward biased. Thus, there will be no current across upper diode junction. The effective circuit will be as shown in figure.

Total resistance of cricuit, `R=50+70+30=150Omega`
Current in circuit, `I=(V )/(R )=(3V)/(150Omega)=0.02A`