Q159 / 160 · AP EAMCET 2018 (22 Apr Shift 1) · Physics

If the diodes are ideal in the circuit given below, then the current through the cell is Figure

  • A
    4 A
  • B
    1.5 A
  • Correct answer
    C
    2 A
  • D
    3 A

Solution

Diode, $D_1=$ reverse biased $(\mathrm{OFF})$ and diode, $D_2=$ forward biased $(\mathrm{ON})$. Because diodes are ideal, so voltage drop across $\mathrm{D}_2$ is zero. $\therefore$ Effective resistance, $R=3+2+3+2=10 \Omega$ Current through the cell, $$ I=V / R=20 / 10=2 \mathrm{~A} $$

Hence, the correct answer is option: 'C'.

Relevant Questions