Option (d)
P5 and P3 (Maximum difference of 4 ranks (5 – 1) = 4)
When resistors R1 and R2 are connected in series across a battery of potential difference V, the power dissipated by the resistors are P1 and P2 respectively. When they are connected in parallel across a battery of potential difference E, the power dissipated is P3 and P4 respectively. Which one of the following is true?