81. In the diagram below the voltmeter V has a resistance of 100 kΩ and is connected such as to measure the potential difference across the 100 kΩ resistor. The battery has an emf of 5.0 V and negligible internal resistance. The reading on the voltmeter will be__________ .5ecb3b753988d.jpg
(A) 4.0V.
(B) 2.5V.
(C) 1.0V.
(D) 0V.

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統計： A(0), B(0), C(3), D(0), E(0) #2319898