MHT CET 2024 Physics question
Two rods, one of copper (Cu) and the other of iron (Fe) having initial lengths and respectively are connected together to form a single rod of length . The coefficient of linear expansion of Cu and Fe are and respectively. If the length of each rod increases by the same amount when their temperatures are raised by , then ratio of will be
Answer: (C)
Solution
Equal increase in length: , so . Then by componendo-dividendo , option
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