In example no 3 6 at page 116 of NCERT Physics, the value of R is found to b 5/6 - Physics - Current Electricity

Question

In example no 3 6 at page 116 of NCERT Physics, the value of R
is found to b 5/6 ohm bt i think that it's incorrect it shud b 5/4
ohm
Even if v put the valur of R=5/6 ohm in the formula I=V/R then v
dnt get the current I as 4 A But on putting R=5/4 ohm, v get the
correct value of I too So it shud b 5/4 and not 5/6
Isnt it ????????

Vijay Yadav · Accepted Answer

Solution of ncert is correct with good explanation, please go
through it more carefully
For R = 1 Î©,
Req = (5/6) Î© and for Îµ = 10 V,
the total current (= 3I ) in the network is
3I = 10 V/(5/6) Î© = 60/5 = 12 A,
i e , I = 4 A