For the circuit branch with current and node definitions as shown below, if R=1k? and I=5mA, and you connect the red (positive) lead of an ideal voltmeter to node "A" and the black (negative) lead to node "B," what would the voltmeter reading be?
A. ?5 kV
B. 5 V
C. 5 mV
D. ?5 mV
E. ?5 V
Answer: B
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