The Power in Watts for a Circuit Is Given by P

question 16

Multiple Choice

The power in watts for a circuit is given by P = I ²R. How fast is the power changing if the resistance, R, of the circuit is 1,400 $\Omega$ , the current, I, is 1.5A, and the current is decreasing with respect to time at a rate of 0.025 A/s. (Assume R is a constant.)

• A) 105 w/s
• B) 4,200 w/s
• C) 26.25 w/s
• D) 157.5 w/s
• E) -105 w/s

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