# Lamp and tugsten

Gyroscope

## Homework Statement

$$p_t=p_{20}(1+\alpha (t-20))$$

I have a circuit with a 3,5 V lamp that has a tungsten filament. I can provide to the circuit a variable voltage. How would I find the melting temperature of tungsten?

I know p_20 and alpha and the voltage I provide. And I have an device to measure current too.

Could I just increase voltage until the lamp turns off (which means the tungsten filament melted), measure the current and by means of Ohm's Law I could find the resistance. And then with the initial formula, I could find the temperature to which corresponds this resistance.

Am i right? Sorry my poor English.

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Gyroscope
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