79. ssm Consider the circuit in the drawing. Determine (a) the magnitude of the current in the circuit and (b) the magnitude of the voltage between the points labeled A and B. (c) State which point, A or B, is at the higher potential.

 

w1031

 

Assume the current goes clockwise.  Write a Kirckhoff loop equation starting at point A

 

 

Solve for i

 

 

 

Voltage walk from A to B

 

 

Since going from A to B is a rise of voltage, point B is at higher potential.

 

Point B is at higher potential!

 

 

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This page last updated on June 18, 2018