Question

If a wire has resistance 100 ohm and current through it is 0.5 A the potential difference across the wire must be ....​

Answer 1

Answer:

R=100ohm,I= 0.5 V=IR. 100*0.5. 50 V

Answer 2

Answer:

If a wire has a resistance of $100\Omega$ and current through it is 0.5 A the potential difference across the wire must be $50\ V$

Explanation:

• Consider a wire of resistance R, with an applied potential V at the ends. Let the current 'I' flow through it. Then, According to Ohm's law, the voltage will be proportional to the current.

• It can be expressed as,

        $V \propto I$      Or     $V = RI$    ...(1)

• In the question, it is given that,

        $R = 100\ \Omega$     $I = 0.5\ A$

        Substitute these values into equation(1)

        $V = 100\times 0.5 = 50 V$