A 20-W Platinum Wire at 20 $\degree$ C with a Temperature Coefficient of Resistivity of 3

question 7

Multiple Choice

A 20-W platinum wire at 20 $\degree$ C with a temperature coefficient of resistivity of 3.9 x 10^-3 ( $\degree$ C) ^-1 will have what resistance at 100 $\degree$ C?

• A)14 W
• B)20 W
• C)26 W
• D)28 W

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