The Temperature Coefficient of Resistivity of Platinum Is $3.9 \times 10 ^ { - 3 } / \mathrm { C } ^ { \circ }$

question 13

Multiple Choice

The temperature coefficient of resistivity of platinum is $3.9 \times 10 ^ { - 3 } / \mathrm { C } ^ { \circ }$ . If a platinum wire has a resistance of $R$ at a temperature of $23 ^ { \circ } \mathrm { C }$ , to what temperature must it be heated in order to double its resistance to $2 R$ ?

• A) \(730 ^ { \circ } \mathrm { C }\)
• B) \(300 ^ { \circ } \mathrm { C }\)
• C) \(930 ^ { \circ } \mathrm { C }\)
• D) \(280 ^ { \circ } \mathrm { C }\)

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Definitions:

Solution Component

Any substance that is part of a solution, typically categorized as either the solute (dissolved material) or the solvent (medium in which solute is dissolved).

Positive

In the context of electric charge, positive refers to an electric charge of the type carried by protons.

Negative

In the context of charge, negative refers to an electrical charge of the same type carried by electrons.