A resistor is connected across an ac source as shown. For this circuit, what is the relationship between the instantaneous current i through the resistor and the instantaneous voltage vab across the resistor?   A. i is maximum one-quarter cycle before vab  B. i is maximum at the same time as vab

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A resistor is connected across an ac source as shown. For this circuit, what is the relationship between the instantaneous current i through the resistor and the instantaneous voltage vab across the resistor?

 

A. i is maximum one-quarter cycle before vab 

B. i is maximum at the same time as vab

C. None of these

D. i is maximum one-quarter cycle after vab

The image shows an electrical circuit diagram featuring an AC voltage source, a resistor, and current flow indication. 

- **Components:**
  - A yellow circle at the top represents an AC (alternating current) voltage source, indicated by the sine wave symbol.
  - A pink zigzag line in the middle represents a resistor denoted by "R."
  - Two black dots labeled "a" and "b" are on either side of the resistor, indicating connection points.

- **Current and Voltage:**
  - The purple arrow labeled "i" points from left to right, showing the direction of the current flow through the resistor.
  - The voltage across the resistor is indicated by "v_R," spanning from point "a" to point "b."
  
This diagram demonstrates the basic configuration of an AC circuit with a resistor, showcasing concepts such as current direction and voltage across a component.
Transcribed Image Text:The image shows an electrical circuit diagram featuring an AC voltage source, a resistor, and current flow indication. - **Components:** - A yellow circle at the top represents an AC (alternating current) voltage source, indicated by the sine wave symbol. - A pink zigzag line in the middle represents a resistor denoted by "R." - Two black dots labeled "a" and "b" are on either side of the resistor, indicating connection points. - **Current and Voltage:** - The purple arrow labeled "i" points from left to right, showing the direction of the current flow through the resistor. - The voltage across the resistor is indicated by "v_R," spanning from point "a" to point "b." This diagram demonstrates the basic configuration of an AC circuit with a resistor, showcasing concepts such as current direction and voltage across a component.
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