Question Detail

PHY 102 Last Minute Prep Objective Question
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Question

A copper coil has a resistance of 200 ohms when its mean temperature is 0°C. Calculate the resistance when its mean temperature is 80°C. Temperature coefficient of copper is 0.004041 per °C.
Options
A 264.65 ohm
Correct Answer
B 264.65 kilo-ohm
C 286.65 ohm
D 286.65 kilo-ohm
Correct Answer

Option A is the correct answer.

Detailed Explanation

R = R₀(1 + αT) = 200(1 + 0.004041×80) = 200×1.32328 = 264.65Ω.

Hint

Resistance variation with temperature: R = R₀(1 + αT).

Question Info

Course: PHY 102
Topic: Last Minute Prep
Type: Objective
Difficulty: Not specified
Question 1804 of 1819
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