You are provided with 48 cells, each of emf 2 volt and internal resistance 4 ohms. What maximum current can flow in the circuit having an external resistance of 12 Ω ?

Question

You are provided with 48 cells, each of emf 2 volt and internal resistance 4 ohms. What maximum current can flow in the circuit having an external resistance of 12 Ω ? (A) 1 A (B) 1.2 A (C) 0.96 A (D) 1.08 A

Tardigrade Admin · Accepted Answer

For maximum current in external resistance R = r ⇒ r =12 Ω so 12 cells joined in series in a row and four such rows joined in parallel I max =(24/12+12)=1 A

Q. You are provided with $48$ cells, each of emf $2$ volt and internal resistance $4$ ohms. What maximum current can flow in the circuit having an external resistance of $12 Ω$ ?

1 A

1.2 A

0.96 A

1.08 A

For maximum current in external resistance
$R = r \Rightarrow r = 12 Ω$ so $12$ cells joined in series in a row and four such rows joined in parallel
$I_{m a x} = \frac{24}{12 + 12} = 1 A$

Q. You are provided with 48 cells, each of emf 2 volt and internal resistance 4 ohms. What maximum current can flow in the circuit having an external resistance of 12Ω ?

1 A

1.2 A

0.96 A

1.08 A

For maximum current in external resistance R=r⇒r=12Ω so 12 cells joined in series in a row and four such rows joined in parallel Imax​=12+1224​=1A

Q. You are provided with $48$ cells, each of emf $2$ volt and internal resistance $4$ ohms. What maximum current can flow in the circuit having an external resistance of $12 Ω$ ?

For maximum current in external resistance
$R = r \Rightarrow r = 12 Ω$ so $12$ cells joined in series in a row and four such rows joined in parallel
$I_{m a x} = \frac{24}{12 + 12} = 1 A$