Question

wood wode to quo so l ista on x Question 3) In a car stereo, each speaker has a resistance of 412. 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? 100.0 00. HO 00.3 90 000 00 V0.81

Answer 1

Power in resistor is given by

P = I^2 * R

given P = 60 W , R = 4 Ω

60.0 = Imax^2 * 4

Imax = 3.873 amp

so Imax is less than the rated current ( 4 amp ) so they are safe for overload as max current will be 3.873 amp which is less than 4.0 amp.

feel free to drop comment if you have any doubt.