The resistance of a thin copper wire is 2.5 Ω at 20°C. On a hot day, the resistance of the wire changes to 2.68 Ω. What is the ambient temperature around the wire?<br />The temperature coefficient of copper is 3.8 x 10⁻³ /°C.<br /><br />Watch the video related to *DC CURRENT* in full:<br />https://dailymotion.com/playlist/x93i4y
