Acircuit carries a current of 0.64 a when there is a resistance of 50.0 ω. the voltage applied to the circuit, to the nearest whole number, is v.

The relationship between current and voltage within a direct current circuit is known as Ohm's law. The equation that relates voltage (V), current (I) and resistance (R) is V=IR. In this case  I=0.64 Amps and R=50 Ohms. Therefore the voltage is simply 0.64 multiplied by 50 and the answer is 32 Volts. The Ohm's law equation can also be rearranged in order to find current or resistance.