Estimate the resistance of the wire

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Reference no: EM13503013

A thermometer can be made from a brass wire (temperature coefficient of resistivity 0.00150°C^?1 at 20.0°C) which has a potential difference of 1.50 V between its ends and is connected to an ammeter. A measurement determines that the current flowing through the wire is 347 mA when the wire is at room temperature (20.0°C).

(a) What is the resistance of the wire?

(b) What change in current will accompany a decrease in temperature of one degree Celsius (or one kelvin)? Be careful of the sign of your answer.

Reference no: EM13503013

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