Question

A potential difference of 15 V produces a current of 0.60 amps in a piece of copper wire. What is the resistance of the wire?

9.0 Ω
18.0 Ω
25 Ω

Answer 1

R = 25 Ohms

Step-by-step explanation:

Given the following data;

Voltage (p.d) = 15 V

Current = 0.6 A

To find the resistance of the wire;

Ohm's law states that at constant temperature, the current flowing in an electrical circuit is directly proportional to the voltage applied across the two points and inversely proportional to the resistance in the electrical circuit.

Mathematically, Ohm's law is given by the formula;

`V = IR`

Where;

V represents voltage measured in voltage.

I represents current measured in amperes.

R represents resistance measured in ohms.

`R = \frac {V}{I}`

Substituting into the equation, we have;

`R = \frac {15}{0.6}`

R = 25 Ohms