11th Physics Monthly Test - 4 ( Heat and Thermodynamics )

MABS Institution

11th Physics Monthly Test - 4 ( Heat and Thermodynamics )-Aug 2020

Time : 2.00 Hours

Part - A

Generic 5 - Answer All Question

a. ‘A lake has more rain’.
b. ‘A hot cup of coff ee has more heat’. What is wrong in these two statements?

Explain in detail the isothermal process.

Eiffel tower is made up of iron and its height is roughly 300 m. During winter season (January) in France the temperature is 2°C and in hot summer its average temperature 25°C. Calculate the change in height of Eiffel tower between summer and winter. The linear thermal expansion coefficient for iron α = 10 ×10-⁶per °C.

The power radiated by a black body A is E_A and the maximum energy radiated was at the wavelength \(\lambda\)A. The power radiated by another black body B is E_B = N E_A and the radiated energy was at the maximum wavelength, 1 2 \(\lambda\)A. What is the value of N?

Discuss the ideal gas laws.

Give some examples of irreversible processes.

Explain Wien’s law and why our eyes are sensitive only to visible rays?

Derive the expression for Carnot engine efficiency.

A hot water cools from 92°C to 84°C in 3 minutes when the room temperature is 27°C. How long will it take for it to cool from 65°C to 60°C?

Calculate the volume of one mole of any gas at STP and at room temperature (300K) with the same pressure 1 atm.

Derive the work done in an isothermal process.

If 5 L of water at 50°C is mixed with 4L of water at 30°C, what will be the final temperature of water? Take the specific heat capacity of water as 4184 J kg-1 K^-1.

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11th Physics Monthly Test - 4 ( Heat and Thermodynamics )

MABS Institution

11th Physics Monthly Test - 4 ( Heat and Thermodynamics )-Aug 2020

Part - A

Generic 5 - Answer All Question

a. ‘A lake has more rain’. b. ‘A hot cup of coff ee has more heat’. What is wrong in these two statements?

Explain in detail the isothermal process.

The power radiated by a black body A is EA and the maximum energy radiated was at the wavelength \(\lambda\)A. The power radiated by another black body B is EB = N EA and the radiated energy was at the maximum wavelength, 1 2 \(\lambda\)A. What is the value of N?

Discuss the ideal gas laws.

Give some examples of irreversible processes.

Explain Wien’s law and why our eyes are sensitive only to visible rays?

Derive the expression for Carnot engine efficiency.

A hot water cools from 92°C to 84°C in 3 minutes when the room temperature is 27°C. How long will it take for it to cool from 65°C to 60°C?

Calculate the volume of one mole of any gas at STP and at room temperature (300K) with the same pressure 1 atm.

Derive the work done in an isothermal process.

If 5 L of water at 50°C is mixed with 4L of water at 30°C, what will be the final temperature of water? Take the specific heat capacity of water as 4184 J kg-1 K-1.

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a. ‘A lake has more rain’.
b. ‘A hot cup of coff ee has more heat’. What is wrong in these two statements?

The power radiated by a black body A is E_A and the maximum energy radiated was at the wavelength \(\lambda\)A. The power radiated by another black body B is E_B = N E_A and the radiated energy was at the maximum wavelength, 1 2 \(\lambda\)A. What is the value of N?

If 5 L of water at 50°C is mixed with 4L of water at 30°C, what will be the final temperature of water? Take the specific heat capacity of water as 4184 J kg-1 K^-1.