What is the phase shift between current and voltage in a purely resistive circuit?

What is the phase shift between current and voltage in a purely resistive circuit?

• A. 90 degrees
• B. 180 degrees
• C. 0 degrees
• D. 45 degrees

Answer: (C)

In a purely resistive circuit, the phase relationship between the voltage and the current is characterized by a phase shift of 0 degrees. This means that the voltage and the current reach their maximum and minimum values at the same time. In essence, the current is in phase with the voltage. When analyzing purely resistive circuits, Ohm's Law (V = IR) applies directly, indicating that the voltage across the resistor is proportional to the current flowing through it with no time delay. As a result, both voltage and current can be represented by sinusoidal functions that align perfectly, confirming that there is no phase difference between them. In summary, since there is no reactive component (inductance or capacitance) to introduce a phase shift, the correct answer is that the phase shift between current and voltage in a purely resistive circuit is 0 degrees.

In a purely resistive circuit, the phase relationship between the voltage and the current is characterized by a phase shift of 0 degrees. This means that the voltage and the current reach their maximum and minimum values at the same time. In essence, the current is in phase with the voltage.

When analyzing purely resistive circuits, Ohm's Law (V = IR) applies directly, indicating that the voltage across the resistor is proportional to the current flowing through it with no time delay. As a result, both voltage and current can be represented by sinusoidal functions that align perfectly, confirming that there is no phase difference between them.

In summary, since there is no reactive component (inductance or capacitance) to introduce a phase shift, the correct answer is that the phase shift between current and voltage in a purely resistive circuit is 0 degrees.