In a circuit, if the voltage is halved and the resistance remains the same, what happens to the current?

When the voltage in a circuit is halved while the resistance remains unchanged, the current will also be halved. This relationship can be understood through Ohm's Law, which states that current (I) is equal to voltage (V) divided by resistance (R), or I = V/R.

If you reduce the voltage to half its value (let's say from V to V/2), while maintaining the same resistance, the equation becomes:

I = (V/2) / R.

This indicates that the new current is half of the original current because you're dividing the original voltage by the same resistance. Therefore, with a constant resistance, a decrease in voltage directly results in a proportional decrease in current.

This principle reflects how electric circuits operate, reinforcing the idea that voltage and current are directly related through resistance. When voltage decreases, current must also decrease if resistance does not change.