Seconds later the toaster warms up


A toaster employ a Nichrome heating wire. When the toaster is turned upon at 20°C, the initial current is 1.50A. A few seconds later the toaster warms up and current now has a value of 1.30A. The average temperature coefficient of resistivity for Nichrome is 0.00045 (C°)-1. What is the temperature of the heating wire?

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Mathematics: Seconds later the toaster warms up
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