Question

find the potential difference required to flow a current of 400 mA in a wire of resistance 40 Ohm?

Answer 1

Answer:

16 volts

Explanation:

400 milli amps = 0.4 amps   (because 1A=1000mA)

V=IR                                        (by ohms law)

V=(0.4)(40)

V=16 Volts