What is the relationship between current, voltage, and resistance in a circuit?

The correct answer describes Ohm's Law, which states that current (I) is directly proportional to voltage (V) and inversely proportional to resistance (R). This means that as the voltage applied across a circuit increases, the current flowing through the circuit also increases, given that the resistance remains constant. Conversely, if the resistance increases while the voltage is held constant, the current will decrease.

This relationship is mathematically expressed in the formula I = V/R, where I is the current in amperes, V is the voltage in volts, and R is the resistance in ohms. This principle is fundamental in circuit analysis and underpins the operation of various electrical and electronic devices.

In summary, the relationship illustrated in the correct answer reflects the essential principles governing electrical circuits and provides crucial insights for troubleshooting and designing circuits in biomedical equipment.