Part A You need to design a 0.80 A fuse that "blows" if the current exceeds 0.80 A. The fuse material in your stockroom melts at a current density of 500 A/cm?. What diameter wire of this material will do the job? Express your answer to two significant figures and include the appropriate units. HA D = Value Units Submit Request Answer Provide Feedback

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Microscopic view of current

In physics, the term current is expressed as the rate of flow of electric charges across the area per unit time (I=q/t). It propagates along in the direction of the motion of positive charges. When the current is caused by the motion of electrons, the direction of the current is opposite to the flow.