NTA Abhyas JEE Main2020PhysicsCurrent ElectricityPractice
In the circuit shown, What is the current (in A ) in the 1 Ω resistor?
Options
- A0 . 13   A , from P to Q
- B1 . 3   A , from P to Q
- C1 . 3   A , from Q to P
- D0 . 13   A , from Q to P
Correct answer
D. 0 . 13   A , from Q to P
Step-by-step solution
R = 3 Ω + 2 Ω Let Potentinal at P = 0 ∴ V A = 6 V , V D = − 9 V and V Q = x Apply KCL at x x − 6 3 + x − 0 1 + x + 9 5 = 0 Solving, x = 3 23 V So, current in 1 Ω resistance is i = 3 23 − 0 1 from Q to P i = 0 . 13 A from Q to P