PHYSICS · Subjective · CBSE · Physics · Current Electricity · Current Electricity
Problem
Two loops share a common 4 Ω resistor CD.
Loop 1 (ACD) has a cell of emf 15 V (positive at A) and a 5 Ω resistor AC in series with CD.
Loop 2 (CBD) has an unknown cell of emf E (positive at B) and a 3 Ω resistor BC in series with CD.
A current of 1.0 A is observed to flow through the 4 Ω resistor from C to D.
Determine the value of the unknown emf E.