In the figure shown, the current in the 10   V battery is close to :

In the figure shown, the current in the 10 V battery is close to :

    

  1. 0.71 A from positive to negative terminal
  2. 0.42 A from positive to negative terminal 
  3. 0.21 A from positive to negative terminal
  4. 0.36 A from negative to postive terminal 

Solution

  

-5i2-10i1+i2-2i2+20=0

-10i1-17i2+20=0

-10+4i1+10i1+i2=0

14i1+10i2+10=0

10i1+17i2=20→×10

14i1+10i2=10→17

-138i1=30

i1=-30138=-0.217

i1 is negative it means current flows from positive to negative terminal

 

Asked in: JEE Main 2020 (06 Sep Shift 2)

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