JEE Main 2022 · 28 Jun · Shift 2 · Physics Q55

PhysicsInteger+4 / -1Question 55 of 90

All resistances in figure are 1 $\Omega$ each. The value of current 'I' is $\dfrac a5$ A. The value of a is ______.

Your answer

Answer and worked solution

Official answer: 8

Binary tree. Working from the far node: $1+\frac12=\frac32$ , then $1+\frac34=\frac74$ , then $1+\frac78=\frac{15}8$ Ω in total.

Current. $\dfrac3{15/8}=\dfrac85$ A, so $a=8$ .

Answer: 8

JEE Main 2022 · 28 Jun · Shift 2, Physics question 55