To what temperature must you raise a silver wire (a = 0.0038), originally at 20.0°C, to triple its resistance, neglecting any changes in dimensions? (You can assume that resistivity varies with temperature linearly) 314.12 °C 608.24 °C 546.32 °C 283.16 °C

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A: Have a look

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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.