Question

Find the current in a 5 Ω resistor connected to a battery with an internal resistance of 3 Ω if the emf of the battery is 9 V.Group of answer choices4.85 A3.00 A1.13 A1.80 A

Answer 1

The correct answer is option C, 1.13 A.

Given,

The resistance of the resistor, R=5 Ω

The internal resistance of the battery, r=3 Ω

The emf of the battery, E=9 V

The current through the battery is given by Ohm's law. According to whch,

$I=\frac{E}{R+r}$

Where I is the current through the resistor R.

On substituting the know values,

$\begin{gathered} I=\frac{9}{5+3} \\ =1.13\text{ A} \end{gathered}$

Therefore the current in the 5 Ω resistor is 1.13 A