2. A wire is 4 in x 0.5 in x 20 ft and a resistivity of 15.75 (2 - CM) ft at 12 °C. Calculate its resistance if the temperature is increased by 50 °C? Take the temperature coefficient of the wire at...

Extracted text: 2. A wire is 4 in x 0.5 in x 20 ft and a resistivity of 15.75 (2 - CM) ft at 12 °C. Calculate its resistance if the temperature is increased by 50 °C? Take the temperature coefficient of the wire at 15 °C is 0.00375 /OC? 3. The resistance of a carbon coil is 10.5 Q at 60 °C. At what temperature will its resistance decrease to 65 percent if its temperaturo o