Consider a metal scale of length 30 cm and an object. The s…

Physics Thermometry, Thermal Expansion and Calorimetry General MCQ (Single Correct)

Consider a metal scale of length 30 cm and an object. The scale is calibrated for temp 20ºC.

What is the actual length of division which is shown as 1 cm by scale at 40ºC. Given α s = 2×10 –5 /ºC.

What will be the reading of scale at 40ºC if the actual length of object is 10 cm. and and and

What will be the actual length of object at 40 ºC if its measured length is 10 cm. . (e) If the linear expansion coefficient of object is α 0 = 4 × 10 –5 and neglecting the expansion of scale, then answers of parts. (f) If α 0 = 4 × 10 –5 and α s = 2 × 10 –5 then find answers of part.

What is % error in measurement for part

Text Solution

Verified by Experts

The correct answer is:

CHECK THE SOLUTION.

λ = 1 {1 + 2 × 10 – 5 ×20}

λ = 10 {1 – 4 × 10 – 4 }

λ = 10 {1 + 4×10 – 4 }

% λ 1 = – 4 × 10 – 2 %

% λ 2 = % ≈ – 4× 10 – 2 %

(e) λ 1 = 10 {1 + 20 × 4 × 10 – 5 }

λ 2 = 10 {1 – 20 × 4 × 10 – 5 }

(f) λ 1 = 10 {1 + 40 × 10 – 5 }

λ 2 = 10 {1 – 40 × 10 – 5 }

Prepare Smarter with CGP Edu

Get practice questions, solutions, and test series in one place.

Write a Review

Share your experience with this question and solution.

Commentary

Send your comment, doubt, correction, or feedback to admin.

Student Reviews

What students say about this solution

No reviews yet. Be the first to write a review.

Share this question

Text Solution

Prepare Smarter with CGP Edu

Write a Review

Commentary

Student Reviews

Similar Questions