Mathematics

Mathematics

Problem

Electrical power in a circuit satisfies

P=IV

. If the power is held constant at

120\text{ W}

while the current is

6\text{ A}

and decreasing at

0.40\text{ A/s}

, what is

\dfrac{dV}{dt}

, the rate of change of the voltage? a)

-\dfrac{4}{3}\text{ V/s}

(voltage decreasing) b)

8\text{ V/s}

(voltage increasing) c)

\dfrac{4}{3}\text{ V/s}

(voltage increasing) d)

\dfrac{8}{3}\text{ V/s}

(voltage increasing)

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