AP EAMCET Engineering 2018 Apr 22 Shift 1 Paper

Consider the figure shown below,The diode D1 is reversed biased and diode D2 is forward biased.
The voltage drop across is zero as the diode is ideal.
The current through the cell is given as,
I=

V

Reff

Here, the effective resistance is given as Reff
.Substitute the value n above expression.
I=

20V

3Ω+2Ω+3Ω+2Ω

=2A