02. Radiation
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Heat Transfer

149538 The spectral energy distribution of a star is maximum at twice temperature as that of sun. The total energy radiated by star is

1 twice as that of the sun
2 same as that of the sun
3 sixteen times as that of the sun
4 one sixteenth of sun
J and K CET- 2005
Heat Transfer

149539 What will be the ratio of temperatures of sun and moon if the wavelengths of their maximum emission radiations rates are $140 \AA$ and $4200 \AA$ respectively?

1 $1: 30$
2 $30: 1$
3 $42: 14$
4 $14: 42$
J and K CET- 2004
Heat Transfer

149540 Solar radiation emitted by sun correspond to that emitted by black body at a temperature of $6000 \mathrm{~K}$. Maximum intensity is emitted at wavelength of $4800 \AA$. If the sun was to cool down from $6000 \mathrm{~K}$ to $3000 \mathrm{~K}$, then the peak intensity of emitted radiation would occur at a wavelength

1 $4800 \AA$
2 $9600 \AA$
3 $2400 \AA$
4 $19200 \AA$
J and K CET- 2003
Heat Transfer

149541 The wavelength $\lambda_{\mathrm{m}}$ of maximum intensity of emission of solar radiation is $\lambda_{\mathrm{m}}=4753 \AA$ and from moon is $14 \mu \mathrm{m}$. The surface temperature of sun and moon are
(Given b $=\mathbf{2 . 8 9 8} \times \mathbf{1 0}^{-3}$ meter Kelvin)

1 $6097 \mathrm{~K}, 207 \mathrm{~K}$
2 $8097 \mathrm{~K}, 307 \mathrm{~K}$
3 $10,000 \mathrm{~K}, 400 \mathrm{~K}$
4 $3000 \mathrm{~K}, 100 \mathrm{~K}$
J and K CET- 2002
NEET DIGITAL LIBRARY
Heat Transfer

149538 The spectral energy distribution of a star is maximum at twice temperature as that of sun. The total energy radiated by star is

1 twice as that of the sun
2 same as that of the sun
3 sixteen times as that of the sun
4 one sixteenth of sun
J and K CET- 2005
Heat Transfer

149539 What will be the ratio of temperatures of sun and moon if the wavelengths of their maximum emission radiations rates are $140 \AA$ and $4200 \AA$ respectively?

1 $1: 30$
2 $30: 1$
3 $42: 14$
4 $14: 42$
J and K CET- 2004
Heat Transfer

149540 Solar radiation emitted by sun correspond to that emitted by black body at a temperature of $6000 \mathrm{~K}$. Maximum intensity is emitted at wavelength of $4800 \AA$. If the sun was to cool down from $6000 \mathrm{~K}$ to $3000 \mathrm{~K}$, then the peak intensity of emitted radiation would occur at a wavelength

1 $4800 \AA$
2 $9600 \AA$
3 $2400 \AA$
4 $19200 \AA$
J and K CET- 2003
Heat Transfer

149541 The wavelength $\lambda_{\mathrm{m}}$ of maximum intensity of emission of solar radiation is $\lambda_{\mathrm{m}}=4753 \AA$ and from moon is $14 \mu \mathrm{m}$. The surface temperature of sun and moon are
(Given b $=\mathbf{2 . 8 9 8} \times \mathbf{1 0}^{-3}$ meter Kelvin)

1 $6097 \mathrm{~K}, 207 \mathrm{~K}$
2 $8097 \mathrm{~K}, 307 \mathrm{~K}$
3 $10,000 \mathrm{~K}, 400 \mathrm{~K}$
4 $3000 \mathrm{~K}, 100 \mathrm{~K}$
J and K CET- 2002
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Heat Transfer

149538 The spectral energy distribution of a star is maximum at twice temperature as that of sun. The total energy radiated by star is

1 twice as that of the sun
2 same as that of the sun
3 sixteen times as that of the sun
4 one sixteenth of sun
J and K CET- 2005
Heat Transfer

149539 What will be the ratio of temperatures of sun and moon if the wavelengths of their maximum emission radiations rates are $140 \AA$ and $4200 \AA$ respectively?

1 $1: 30$
2 $30: 1$
3 $42: 14$
4 $14: 42$
J and K CET- 2004
Heat Transfer

149540 Solar radiation emitted by sun correspond to that emitted by black body at a temperature of $6000 \mathrm{~K}$. Maximum intensity is emitted at wavelength of $4800 \AA$. If the sun was to cool down from $6000 \mathrm{~K}$ to $3000 \mathrm{~K}$, then the peak intensity of emitted radiation would occur at a wavelength

1 $4800 \AA$
2 $9600 \AA$
3 $2400 \AA$
4 $19200 \AA$
J and K CET- 2003
Heat Transfer

149541 The wavelength $\lambda_{\mathrm{m}}$ of maximum intensity of emission of solar radiation is $\lambda_{\mathrm{m}}=4753 \AA$ and from moon is $14 \mu \mathrm{m}$. The surface temperature of sun and moon are
(Given b $=\mathbf{2 . 8 9 8} \times \mathbf{1 0}^{-3}$ meter Kelvin)

1 $6097 \mathrm{~K}, 207 \mathrm{~K}$
2 $8097 \mathrm{~K}, 307 \mathrm{~K}$
3 $10,000 \mathrm{~K}, 400 \mathrm{~K}$
4 $3000 \mathrm{~K}, 100 \mathrm{~K}$
J and K CET- 2002
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Heat Transfer

149538 The spectral energy distribution of a star is maximum at twice temperature as that of sun. The total energy radiated by star is

1 twice as that of the sun
2 same as that of the sun
3 sixteen times as that of the sun
4 one sixteenth of sun
J and K CET- 2005
Heat Transfer

149539 What will be the ratio of temperatures of sun and moon if the wavelengths of their maximum emission radiations rates are $140 \AA$ and $4200 \AA$ respectively?

1 $1: 30$
2 $30: 1$
3 $42: 14$
4 $14: 42$
J and K CET- 2004
Heat Transfer

149540 Solar radiation emitted by sun correspond to that emitted by black body at a temperature of $6000 \mathrm{~K}$. Maximum intensity is emitted at wavelength of $4800 \AA$. If the sun was to cool down from $6000 \mathrm{~K}$ to $3000 \mathrm{~K}$, then the peak intensity of emitted radiation would occur at a wavelength

1 $4800 \AA$
2 $9600 \AA$
3 $2400 \AA$
4 $19200 \AA$
J and K CET- 2003
Heat Transfer

149541 The wavelength $\lambda_{\mathrm{m}}$ of maximum intensity of emission of solar radiation is $\lambda_{\mathrm{m}}=4753 \AA$ and from moon is $14 \mu \mathrm{m}$. The surface temperature of sun and moon are
(Given b $=\mathbf{2 . 8 9 8} \times \mathbf{1 0}^{-3}$ meter Kelvin)

1 $6097 \mathrm{~K}, 207 \mathrm{~K}$
2 $8097 \mathrm{~K}, 307 \mathrm{~K}$
3 $10,000 \mathrm{~K}, 400 \mathrm{~K}$
4 $3000 \mathrm{~K}, 100 \mathrm{~K}$
J and K CET- 2002
NEET DIGITAL LIBRARY