A resistance R whose value is varied from 1 Ω to 5 Ω is connected to a cell of internal resistance 3 Ω . The power consumed by R

Question

A resistance R whose value is varied from 1 Ω to 5 Ω is connected to a cell of internal resistance 3 Ω . The power consumed by R (A) increases continuously (B) decreases continuously (C) first decreases then increases (D) first increases then decreases

Tardigrade Admin · Accepted Answer

P=((E/R + 3))2R (dP/dR)=0 at R=3Ω so power is maximum at Therefore increase continuously till R=3Ω and then decreases

Q. A resistance $R$ whose value is varied from $1 Ω$ to $5 Ω$ is connected to a cell of internal resistance $3 Ω$ . The power consumed by $R$

increases continuously

decreases continuously

first decreases then increases

first increases then decreases

$P = (\frac{E}{R + 3})^{2} R$
$\frac{d P}{d R} = 0 a t R = 3Ω$ so power is maximum at
Therefore increase continuously till $R = 3Ω$ and then decreases

Q. A resistance R whose value is varied from 1Ω to 5Ω is connected to a cell of internal resistance 3Ω . The power consumed by R