AP EAMCET Engineering 2018 Apr 23 Shift 2 Paper

Consider the circuit diagram,As, the resistance of portion B is higher, so there is greater potential drop across B occur.
The expression of the power output is,
P=

V2

R

From the above equation, least value of the resistance results in higher power output.
Thus, 4 Ω bulb will glow with maximum intensity.