In the circuit segment shown if I = 7 mA and Q = 50 µC,what is the potential difference,V_A - V_B? A) −40 V B) +40 V C) +20 V D) -20 V

Question

Quizplus · Accepted Answer

Using Kirchhoff's Voltage Law, we can write: V_A - V_B - U1B1A = 0 Rearranging the terms, we get: V_A - V_B = U1B1A Now, using Ohm's Law, we can write: U1B1A = IR1 Substituting the given values, we get: U1B1A = (7 mA)*(6 kΩ) = 42 V Therefore, V_A - V_B = U1B1A = 42 V Since the potential difference across the resistor R1 is from left to right, it is negative with respect to the direction from VS1 to ground. Therefore, the correct answer is D) -20 V.

In the Circuit Segment Shown If I = 7 MA