Question

If the potential difference is 3.2V and the resistance of the wire is 7.2 Ω, calculate the current flowing through it

Answer 1

Answer:

V=IR

so current will be, 3.2/7.2= 0.444

Answer 2

Answer:

If the potential difference is 3.2V and the resistance of the wire is 7.2 Ω, the current flowing through it will be $0.4444\ A$

Explanation:

• Let V be the voltage applied, I be the current flowing through the conductor, and R be the resistance.

• According to Ohm's law,

        $\text V \propto \text I$

         or

        $\text V =\text { IR }$ ...(1)

• That is the current flowing through a conductor is directly proportional to the voltage applied across the terminals.

• Then using equation (1),

        $\text I =\frac{\text V}{\text R}$     ...(2)

In the question, it is given that,

$\text V = 3.2 V$

$\text R =7.2\ \Omega$

Substitute these values into equation (1)

$\text I = \frac{3.2}{7.2} = 0.4444\ A$