AIEEE 2007 | Heat and Thermodynamics Question 419 | Physics

A Carnot engine, having an efficiency of $$\eta = 1/10$$ as heat engine, is used as a refrigerator . If the work done on the system is $$10$$ $$J$$, the amount of energy absorbed from the reservoir at lower temperature is

$$100$$ $$J$$

$$99$$ $$J$$

$$90$$ $$J$$

$$1$$ $$J$$

AIEEE 2007

MCQ (Single Correct Answer)

-1

If $${C_p}$$ and $${C_v}$$ denote the specific heats of nitrogen per unit mass at constant pressure and constant volume respectively, then

$${C_p} - {C_v} = 28R$$

$${C_p} - {C_v} = R/28$$

$${C_p} - {C_v} = R/14$$

$${C_p} - {C_v} = R$$

AIEEE 2006

MCQ (Single Correct Answer)

-1

Assuming the Sun to be a spherical body of radius $$R$$ at a temperature of $$TK$$, evaluate the total radiant powered incident of Earth at a distance $$r$$ from the Sun

Where r₀ is the radius of the Earth and $$\sigma $$ is Stefan's constant.

$$4\pi r_0^2{R^2}\sigma {{{T^4}} \over {{r^2}}}$$

$$\pi r_0^2{R^2}\sigma {{{T^4}} \over {{r^2}}}$$

$$r_0^2{R^2}\sigma {{{T^4}} \over {4\pi {r^2}}}$$

$${R^2}\sigma {{{T^4}} \over {{r^2}}}$$

AIEEE 2006

MCQ (Single Correct Answer)

-1

The work of $$146$$ $$kJ$$ is performed in order to compress one kilo mole of gas adiabatically and in this process the temperature of the gas increases by $${7^ \circ }C.$$ The gas is $$\left( {R = 8.3J\,\,mo{l^{ - 1}}\,{K^{ - 1}}} \right)$$

diatomic

triatomic

a mixture of monoatomic and diatomic

monoatomic

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