What is thermal resistivity? What does it depend upon?
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On which factors does the escape speed of a body from the surface of Earth depend?
The escape speed depends only on the mass and radius of the planet. [Note: Escape velocity does not depend upon the mass of the body]
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What is thermal stress? Give an example of disadvantages of thermal stress in practical use?
1. Consider a metallic rod of length l0 fixed between two rigid supports at T°C. If the temperature of rod is increased by ∆T, length of rod would become, l =...
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Explain rotational analogue of the force. On what factors does it depend? Represent it in vector form.
1. Rotational analogue of the force is called as moment of force or torque. 2. It depends on the mass of the object, the point of application of the force and...
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On which factors does the electrical conductivity of a pure semiconductor depend at a given temperature?
For pure semiconductor, the number density of free electrons and number density of holes is equal. Thus, at a given temperature, the conductivity of pure semiconductor depends on the number...
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How does the escape velocity of a particle depend on its mass?
Correct option is: (C) \(m^0\) Escape velocity \(ve = \sqrt{2gRe}\) Escape velocity does not depend on the mass.
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How does the escape velocity of a particle depend on its mass?
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What is thermal expansion? List types of thermal expansion.
1. A change in the temperature of a body causes change in its dimensions. 2. The increase in the dimensions of a body due to an increase in its temperature is...
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How does coefficient of volume expansion depend upon temperature?
1. As compared to coefficient of linear expansion (α) and coefficient of areal expansion (β), γ changes more with temperature. 2. It is constant only at high temperatures.
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Do coefficient of areal expansion and coefficient of volume expansion depend upon nature of material?
Yes, coefficient of areal expansion and coefficient of volume expansion depend upon nature of material.
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Does nature of the image depend upon size of the mirror?
No, nature of the image is independent of size of the mirror.
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