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Exam
NEET
Subject
Physics
Chapter
Thermal Properties of Matter

NEET · Physics · Thermal Properties of Matter

We would like to prepare a scale whose length does not change with...

We would like to prepare a scale whose length does not change with temperature. It is proposed to prepare a unit scale of this type whose length remains, say 10 cm. We can use a bimetallic strip made of brass and iron each of different length whose length (both components) would change in such a way that difference between their lengths remain constant. If αiron=1.2× 10-5/K and αiron=1.8× 10-5/K , what should we take as length of each strip?

Options

  1. A10cm
  2. B20cm
  3. C30cm
  4. D40cm

Correct answer

B. 20cm

Step-by-step solution

Correct Option is : (B)
20cm
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