Consider the figure below. An ammeter (AM) and voltmeter (VM) are connected to m

Question

Consider the figure below. An ammeter (AM) and voltmeter (VM) are connected to measure the current through and the voltage across a device D. When the current enters the AM meter at the + terminal the reading will be positive, otherwise a negative reading results. If the actual voltage potential at the + terminal is higher than the voltage potential at the - terminal of the VM meter, the reading will be positive, otherwise a negative reading results. For purposes of this exercise assume that the VM does not require any current through it to register a reading. Decide whether Passive or Active Sign Convention used in this figure. Give reasons for your answer. Calculate the power for the device D, and indicate if it absorbs or generates power if the AM reading 3 A and the VM reading is -10 V

Explanation / Answer

filled circle for passive sign convention reason: passive element collect or absorb energy and filled with passage time circle for active sign convection active device supply energy so empty with respect to time power =30watt (absorb)

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