A coil has resistance of 18 Ω when its mean temperature is 20 o C and of 20 Ω when its…
Physics · JEE Main · NTA Exams — Current Electricity
A coil has resistance of 18 Ω when its mean temperature is 20oC and of 20 Ω when its mean temperature is 50 oC. What will be mean temperature rise when its resistance is 21 Ω and the surrounding temperature is 15oC.
- 40oC
- 50oC
- 60oC
- 70oC
Answer
(B) 50 o C
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