Temperature of plate is increased by 
θ then find new
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
= R 1 (1 + αΔθ )
= R 2 (1 + αΔθ )
– 
= (R 2 – R 1 ) (1 + αΔθ )
= ( π 
– π 
) (1 + 2 αΔθ ) = A(1 + 2 αΔθ )
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