The temperature coefficient of resistance of a material is `0.004 ""^@C^(-1)`. Let `R_0` be the resistance of a wire made from this material at `0^@C` . What should be the temperature of this object so that its resistance increases by `2R_0` ?

Explanation

To solve the problem, we will use the formula for the resistance of a material as a function of temperature, which is given by:

\[ R = R_0 (1 + \alpha \Delta T) \]

Where:
- \( R \) is the final resistance,
- \( R_0 \) is the initial resistance at \( 0^\circ C \),
- \( \alpha \) is the temperature coefficient of resistance,
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