A bar of iron is 10 cm at 20^∘ C. At 19^∘ C it will be (αof iron .=11 ×10^-6 / ^∘ C) (a) 11 ×10

step 1 In this question we have given a bar of iron that is 10 semi and at 20 degrees Celsius which is

A bar of iron is 10 cm at 20^∘ C. At 19^∘ C it will be (αof...

A bar of iron is $10 \mathrm{~cm}$ at $20^{\circ} \mathrm{C}$. At $19^{\circ} \mathrm{C}$ it will be $(\alpha$ of iron $\left.=11 \times 10^{-6} /{ }^{\circ} \mathrm{C}\right)$ (a) $11 \times 10^{-6} \mathrm{~cm}$ longer (b) $11 \times 10^{-6} \mathrm{~cm}$ shorter (c) $11 \times 10^{-5} \mathrm{~cm}$ shorter (d) $11 \times 10^{-5} \mathrm{~cm}$ longer

A bar of iron is $10 \mathrm{~cm}$ at $20^{\circ} \mathrm{C}$. At $19^{\circ} \mathrm{C}$ it will be $(\alpha$ of iron $\left.=11 \times 10^{-6} /{ }^{\circ} \mathrm{C}\right)$
(a) $11 \times 10^{-6} \mathrm{~cm}$ longer
(b) $11 \times 10^{-6} \mathrm{~cm}$ shorter
(c) $11 \times 10^{-5} \mathrm{~cm}$ shorter
(d) $11 \times 10^{-5} \mathrm{~cm}$ longer

Labs

Want to see this concept in action?

NEW

Explore this concept interactively to see how it behaves as you change inputs.

View Labs

Key Concepts

Application of the Linear Expansion Formula

The formula for linear expansion, ?L = ?L??T, provides a straightforward method to calculate the change in length of an object given its original length, the coefficient of linear expansion, and the change in temperature. This formula is central to problems involving dimensional changes due to thermal effects.

Temperature Change Effect

Temperature change effects describe how the physical dimensions of materials adjust due to variations in temperature. This concept is critical in understanding how contraction occurs when the temperature decreases and expansion when it increases.

Coefficient of Linear Expansion

The coefficient of linear expansion is a material property that quantifies the relative change in length per unit change in temperature. It is used to predict how a given material will contract or expand with temperature variations.

Thermal Expansion

Thermal expansion is the phenomenon where the dimensions of a material change in response to temperature changes. In solids, this primarily affects the linear dimensions, causing them to increase with rising temperature and decrease with falling temperature.

Transcript

Please give Ace some feedback