When two identical batteries of internal resistance $1\,\,{\rm{\Omega }}$ each are connected in series across a resistor $R$, the rate of heat produced in $R$ is ${J_1}$. When the same batteries are connected ${\rm{I}}$ parallel across $R$, the rate is ${J_2}$. If ${J_1} = 2.25\,\,{J_2}$ then the value of $R$ in ${\rm{\Omega }}$ is

JEE PHYSICS MCQ: CURRENT ELECTRICITY

1 Medium

1 of 1

Application +4 | -1

When two identical batteries of internal resistance

1\,\,\mathrm{\Omega }

each are connected in series across a resistor

R

, the rate of heat produced in

R

{J_1}

. When the same batteries are connected

\mathrm{I}

parallel across

R

, the rate is

{J_2}

. If

{J_1} = 2.25\,\,{J_2}

then the value of

R

\mathrm{\Omega }

View answer and explanation

Correct option: D

5.16

Option D (5.16) is incorrect. The correct answer is R = 4. The solution provided in the original response is incorrect. The correct answer is 4.