Question

In a circuit two or more cells of the same e.m.f are connected in parallel in order
1) Increases the pd across a resistance in the circuit
2) Decreases pd across a resistance in the circuit
3) Facilitate drawing more current from the battery system
4) Change the e.m.f across the system of batteries

• A. Increases the pd across a resistance in the circuit.
• B. Decreases pd across a resistance in the circuit.
• C. Facilitate drawing more current from the battery system.
• D. Change the e.m.f across the system of batteries.

Answer 1

Answer: (C)

When $n$ numbers of cells are connected in parallel then:

$\Rightarrow r_{eff}=\frac{r}{n}$

$\Rightarrow E_{eff}=E$

$\Rightarrow I=\frac{E}{\frac{r}{n}+R}$
$\therefore$ Facilitating to draw more current from the battery system.