A coil has resistance of 18Ω when its mean temperature is 200°C and of 20Ω when its mean temperature is 500°C.

Question 1

A coil has resistance of 18Ω when its mean temperature is 200°C and of 20Ω when its mean temperature is 500°C. What will be mean temperature rise when its resistance is 21Ω and the surrounding temperature is 150°C

(a) 40°C

(b) 50°C

(c) 60°C

(d) 70°C

Question 2

Correct option(b)

Explanation:

A coil has resistance of 18Ω when its mean temperature is 200°C and of 20Ω when its mean temperature is 500°C.

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A coil has resistance of 18Ω when its mean temperature is 200°C and of 20Ω when its mean temperature is 500°C.

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