   Chapter 17, Problem 64AP

Chapter
Section
Textbook Problem

In a certain stereo system, each speaker has a resistance of 4.00 Ω. The system is rated at 60.0 W in each channel. Each speaker circuit includes a fuse rated at a maximum current of 4.00 A. Is this system adequately protected against overload?

To determine
Whether the stereo system is adequately protected against overload with fuse rated 4.0A .

Explanation

Given Info: The resistance of speaker is 4.00Ω . Each channel of system is rated 60.0W . The maximum current rating of fuse in the speaker circuit is 4.0A .

Explanation:

Formula to calculate the maximum current through the stereo is,

Imax=PmaxR

• Imax is the maximum current which can flow  through stereo circuit,
• Pmax is the maximum power delivered to the speaker,
• R is the resistance of the speaker.

Substitute 60.0W for Pmax and 4

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