Practice question

Given: A 40 V battery with negligible internal resistance is connected to a cubical network of 12 resistors, each 4 Ω . What is the total current? These values define the system as per NCERT data. Formula: Equivalent resistance: R_{eq = 5/6 R = 5/6 × 4 = 20/6 approx 3.33 Ω. This is standard NCERT relation. Substitution & Calculation: Total current: I = fracVR_{eq = frac4020/6 = 40 × 6/20 = 12 A . Result: The computed value matches expected outcome and confirms correct choice as per NCERT.