If the voltage is halved at the same resistance, what happens to the current?

When the voltage is halved while maintaining the same resistance, the current also decreases. This relationship is explained by Ohm's Law, which states that current (I) is equal to the voltage (V) divided by the resistance (R). Specifically, the formula is expressed as I = V/R.

If you halve the voltage, you are effectively reducing the potential difference driving the current through the resistance. Since the resistance remains constant, the new current can be calculated as half of the original current. For example, if the original voltage resulted in a current of 10 amps, halving the voltage would result in a current of 5 amps.

Therefore, when the voltage is reduced to half its original value, the current consequently becomes half as well, thereby demonstrating the direct relationship between voltage and current when resistance remains unchanged.