Question

If a wire has resistance 200 and the current
through it is 0.5 A, the potential difference across
the wire must be​

Answer 1

Answer:

100 V

Step-by-step explanation:

R = 200 Ω

I = 0.5 A

V = ??

I = V/R

V = R * I

V = 200 * 0.5

V = 100 V

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Answer 2

Answer:

If a wire has resistance $200\Omega$ and the current  through it is 0.5 A, the potential difference across  the wire must be $100\ V$

Step-by-step explanation:

• Let R be the resistance of a wire, V be an applied potential V at the ends and I be the current 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,

        $R = 200\ \Omega$     $I = 0.5\ A$

        Substitute these values into equation(1),

        $V = 200\times 0.5 = 100 V$