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