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19. Find the current in a circuit if the power is 500 W (watts) and the resistance is 25 ohms. Round off your answer to two decimal places. Use the formula . A. 4.47 A B. 0.22 A C. 20 A D. 0.05 A

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1 vote

Answer:

A

Explanation:

The formula that relates current, power and resistance is


I=\sqrt{(P)/(R)}

Where

I is the current (in amperes)

P is the power (in watts)

R is the resistance (in ohms)

We know P = 500 and R = 25, we plug them into the formula and solve for I:


I=\sqrt{(P)/(R)}\\I=\sqrt{(500)/(25)}\\I=√(20)\\ I=4.47

Correct answer is 4.47 Amperes, or choice A.

User Arnold Veltmann
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