Question

select the correct answer. john performs an experiment on an electric circuit. he increases the voltage from 25 volts to 50 volts while keeping the resistance constant. what will be the effect of johns changes on the current? a. the current will increase. b. the current will decrease. c. the current will stay constant. d. the current will stop flowing.

Explanation:

Step1: Recall Ohm's Law

Ohm's Law is $I=\frac{V}{R}$, where $I$ is current, $V$ is voltage and $R$ is resistance.

Step2: Analyze the change

Given that $R$ is constant, and $V$ changes from 25 volts to 50 volts. As $I=\frac{V}{R}$, when $R$ is fixed and $V$ doubles (from 25 to 50), $I$ will also double. So the current will increase.

Answer:

A. The current will increase.