Question: A black box with a circuit in it is connected to a variable resistor. An ideal ammeter (with zero resistance) and an ideal voltmeter (with

A black box with a circuit in it is connected to a variable resistor. An ideal ammeter (with zero resistance) and an ideal voltmeter (with infinite resistance) are used to measure current and voltage as shown in Fig. 4.143. The result are shown in the table below.

(a) Find i when R = 4 (
(b) Determine the maximum power from the box

Black box 3 1.5 1.0 10.5 0.75 14

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