Podcast
Questions and Answers
What is the primary reason for thermal expansion in solids?
What is the primary reason for thermal expansion in solids?
- Increase in amplitude of vibration of atoms with temperature (correct)
- Decrease in potential energy of atoms with temperature
- Increase in intermolecular force with temperature
- Decrease in average distance between atoms with temperature
What type of thermal expansion is exhibited by liquids and gases?
What type of thermal expansion is exhibited by liquids and gases?
- Superficial expansion
- Linear expansion
- Two-dimensional expansion
- Volume expansion (correct)
What is the unit of the coefficient of linear expansion?
What is the unit of the coefficient of linear expansion?
- m°C
- m/°C
- °C
- /°C (correct)
What is the reason for minimum thermal expansion in solids?
What is the reason for minimum thermal expansion in solids?
What is the relationship between the coefficients of linear, superficial, and volume expansions?
What is the relationship between the coefficients of linear, superficial, and volume expansions?
What is the coefficient of volume expansion of a substance?
What is the coefficient of volume expansion of a substance?
What is the relationship between the coefficients of linear expansion and volume expansion for anisotropic solids?
What is the relationship between the coefficients of linear expansion and volume expansion for anisotropic solids?
What is the unit of coefficient of linear expansion?
What is the unit of coefficient of linear expansion?
What happens to the density of a substance when it is heated?
What happens to the density of a substance when it is heated?
What is the purpose of designing a physical instrument with a constant difference in length of 10 cm between an iron rod and a copper cylinder?
What is the purpose of designing a physical instrument with a constant difference in length of 10 cm between an iron rod and a copper cylinder?
What is the reason behind leaving space between the ends of two rails when laid down on the ground?
What is the reason behind leaving space between the ends of two rails when laid down on the ground?
Why are test tubes, beakers and crucibles often made of pyrex-glass or silica?
Why are test tubes, beakers and crucibles often made of pyrex-glass or silica?
What is the reason behind using invar alloy for making pendulum of wall clock and balance wheel of wrist watch?
What is the reason behind using invar alloy for making pendulum of wall clock and balance wheel of wrist watch?
What is the effect of thermal expansion on the hollow sphere?
What is the effect of thermal expansion on the hollow sphere?
Why is the iron rim to be put on a cart wheel made of slightly smaller diameter than that of the wheel?
Why is the iron rim to be put on a cart wheel made of slightly smaller diameter than that of the wheel?
What is the relationship between the specific heat of a solid and the slope of its temperature-time curve?
What is the relationship between the specific heat of a solid and the slope of its temperature-time curve?
In the region where the temperature of a substance is constant, what is happening to the substance?
In the region where the temperature of a substance is constant, what is happening to the substance?
For anisotropic solids, the coefficient of volume expansion γ is equal to:
For anisotropic solids, the coefficient of volume expansion γ is equal to:
What is the relationship between the latent heat of fusion and the length of the line of zero slope on a temperature-time curve?
What is the relationship between the latent heat of fusion and the length of the line of zero slope on a temperature-time curve?
A thermometer is designed to have a constant difference in length of 10 cm between an iron rod and a copper cylinder laid side by side at all temperatures. If αFe = 11 × 10^-6°C^-1 and αCu = 17 × 10^-6°C^-1, what are the lengths of the iron rod and copper cylinder?
A thermometer is designed to have a constant difference in length of 10 cm between an iron rod and a copper cylinder laid side by side at all temperatures. If αFe = 11 × 10^-6°C^-1 and αCu = 17 × 10^-6°C^-1, what are the lengths of the iron rod and copper cylinder?
The density of a substance decreases with an increase in temperature due to:
The density of a substance decreases with an increase in temperature due to:
What is the specific heat of a substance in the region where its temperature is changing?
What is the specific heat of a substance in the region where its temperature is changing?
The binomial theorem is used to simplify the expression for the density of a substance at a given temperature, which is:
The binomial theorem is used to simplify the expression for the density of a substance at a given temperature, which is:
What is the state of a substance in the region where its temperature is constant and its specific heat is infinite?
What is the state of a substance in the region where its temperature is constant and its specific heat is infinite?
Isotropic solids have a coefficient of volume expansion that is:
Isotropic solids have a coefficient of volume expansion that is:
What is the main reason behind the independence of the expansion of a body's area or volume from the shape and size of the hole or cavity?
What is the main reason behind the independence of the expansion of a body's area or volume from the shape and size of the hole or cavity?
Why is the rise in temperature of a hollow sphere more than that of a solid sphere of the same material when heated to the same temperature?
Why is the rise in temperature of a hollow sphere more than that of a solid sphere of the same material when heated to the same temperature?
What is the primary reason behind the use of pyrex-glass or silica for making test tubes, beakers, and crucibles?
What is the primary reason behind the use of pyrex-glass or silica for making test tubes, beakers, and crucibles?
Why are transmission cables not tightly fixed to the poles?
Why are transmission cables not tightly fixed to the poles?
What is the main advantage of using invar alloy for making pendulum of wall clock and balance wheel of wrist watch?
What is the main advantage of using invar alloy for making pendulum of wall clock and balance wheel of wrist watch?
