02. Radiation
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Heat Transfer

149511 Ordinary bodies ' $A$ ' and ' $B$ ' radiate maximum energy with wavelength difference $4 \mu \mathrm{m}$. The absolute temperature of body ' $A$ ' is 3 times that of ' $B$ '. The wavelength at which body ' $B$ ' radiates maximum energy is

1 $4 \mu \mathrm{m}$
2 $8 \mu \mathrm{m}$
3 $12 \mu \mathrm{m}$
4 $6 \mu \mathrm{m}$
MHT-CET 2020
Heat Transfer

149512 Two spheres ' $S_{1}$ ' and ' $S_{2}$ ' have radii ' $R$ ' and '3R', temperature ' $T$ ' $K$ and $\frac{T}{3} K$ respectively. If they are coated with a material of same emissivity, rate of radiation of ' $S_{1}$ ' is $E$ then rate of radiation of ' $S_{2}$ ' is (sphere are of the same material)

1 $\frac{E}{9}$
2 $\frac{E}{3}$
3 $\frac{E}{12}$
4 $\frac{E}{6}$
MHT-CET 2020
Heat Transfer

149513 Two black spheres ' $P$ ' and ' $Q$ ' have radii in the ratio $3: 2$. The wavelengths of maximum intensity radiation are in the ratio $3: 4$ respectively. The ratio of radiated power by ' $P$ ' to ' $Q$ ' is

1 $\frac{25}{9}$
2 $\frac{74}{9}$
3 $\frac{16}{9}$
4 $\frac{64}{9}$
MHT-CET 2020
Heat Transfer

149514 Two spheres ' $S_{1}$ ' and ' $S_{2}$ ' have same radii but temperatures $T_{1}$ and $T_{2}$ respectively. Their emissive power is same and emissivity is in the ratio $1: 4$. Then the ratio of $T_{1}$ to $T_{2}$ is

1 $\sqrt{2}: 1$
2 $1: \sqrt{2}$
3 $1: 2$
4 $2: 1$
MHT-CET 2020
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Heat Transfer

149511 Ordinary bodies ' $A$ ' and ' $B$ ' radiate maximum energy with wavelength difference $4 \mu \mathrm{m}$. The absolute temperature of body ' $A$ ' is 3 times that of ' $B$ '. The wavelength at which body ' $B$ ' radiates maximum energy is

1 $4 \mu \mathrm{m}$
2 $8 \mu \mathrm{m}$
3 $12 \mu \mathrm{m}$
4 $6 \mu \mathrm{m}$
MHT-CET 2020
Heat Transfer

149512 Two spheres ' $S_{1}$ ' and ' $S_{2}$ ' have radii ' $R$ ' and '3R', temperature ' $T$ ' $K$ and $\frac{T}{3} K$ respectively. If they are coated with a material of same emissivity, rate of radiation of ' $S_{1}$ ' is $E$ then rate of radiation of ' $S_{2}$ ' is (sphere are of the same material)

1 $\frac{E}{9}$
2 $\frac{E}{3}$
3 $\frac{E}{12}$
4 $\frac{E}{6}$
MHT-CET 2020
Heat Transfer

149513 Two black spheres ' $P$ ' and ' $Q$ ' have radii in the ratio $3: 2$. The wavelengths of maximum intensity radiation are in the ratio $3: 4$ respectively. The ratio of radiated power by ' $P$ ' to ' $Q$ ' is

1 $\frac{25}{9}$
2 $\frac{74}{9}$
3 $\frac{16}{9}$
4 $\frac{64}{9}$
MHT-CET 2020
Heat Transfer

149514 Two spheres ' $S_{1}$ ' and ' $S_{2}$ ' have same radii but temperatures $T_{1}$ and $T_{2}$ respectively. Their emissive power is same and emissivity is in the ratio $1: 4$. Then the ratio of $T_{1}$ to $T_{2}$ is

1 $\sqrt{2}: 1$
2 $1: \sqrt{2}$
3 $1: 2$
4 $2: 1$
MHT-CET 2020
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Heat Transfer

149511 Ordinary bodies ' $A$ ' and ' $B$ ' radiate maximum energy with wavelength difference $4 \mu \mathrm{m}$. The absolute temperature of body ' $A$ ' is 3 times that of ' $B$ '. The wavelength at which body ' $B$ ' radiates maximum energy is

1 $4 \mu \mathrm{m}$
2 $8 \mu \mathrm{m}$
3 $12 \mu \mathrm{m}$
4 $6 \mu \mathrm{m}$
MHT-CET 2020
Heat Transfer

149512 Two spheres ' $S_{1}$ ' and ' $S_{2}$ ' have radii ' $R$ ' and '3R', temperature ' $T$ ' $K$ and $\frac{T}{3} K$ respectively. If they are coated with a material of same emissivity, rate of radiation of ' $S_{1}$ ' is $E$ then rate of radiation of ' $S_{2}$ ' is (sphere are of the same material)

1 $\frac{E}{9}$
2 $\frac{E}{3}$
3 $\frac{E}{12}$
4 $\frac{E}{6}$
MHT-CET 2020
Heat Transfer

149513 Two black spheres ' $P$ ' and ' $Q$ ' have radii in the ratio $3: 2$. The wavelengths of maximum intensity radiation are in the ratio $3: 4$ respectively. The ratio of radiated power by ' $P$ ' to ' $Q$ ' is

1 $\frac{25}{9}$
2 $\frac{74}{9}$
3 $\frac{16}{9}$
4 $\frac{64}{9}$
MHT-CET 2020
Heat Transfer

149514 Two spheres ' $S_{1}$ ' and ' $S_{2}$ ' have same radii but temperatures $T_{1}$ and $T_{2}$ respectively. Their emissive power is same and emissivity is in the ratio $1: 4$. Then the ratio of $T_{1}$ to $T_{2}$ is

1 $\sqrt{2}: 1$
2 $1: \sqrt{2}$
3 $1: 2$
4 $2: 1$
MHT-CET 2020
For More Updates join with Us
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
Heat Transfer

149511 Ordinary bodies ' $A$ ' and ' $B$ ' radiate maximum energy with wavelength difference $4 \mu \mathrm{m}$. The absolute temperature of body ' $A$ ' is 3 times that of ' $B$ '. The wavelength at which body ' $B$ ' radiates maximum energy is

1 $4 \mu \mathrm{m}$
2 $8 \mu \mathrm{m}$
3 $12 \mu \mathrm{m}$
4 $6 \mu \mathrm{m}$
MHT-CET 2020
Heat Transfer

149512 Two spheres ' $S_{1}$ ' and ' $S_{2}$ ' have radii ' $R$ ' and '3R', temperature ' $T$ ' $K$ and $\frac{T}{3} K$ respectively. If they are coated with a material of same emissivity, rate of radiation of ' $S_{1}$ ' is $E$ then rate of radiation of ' $S_{2}$ ' is (sphere are of the same material)

1 $\frac{E}{9}$
2 $\frac{E}{3}$
3 $\frac{E}{12}$
4 $\frac{E}{6}$
MHT-CET 2020
Heat Transfer

149513 Two black spheres ' $P$ ' and ' $Q$ ' have radii in the ratio $3: 2$. The wavelengths of maximum intensity radiation are in the ratio $3: 4$ respectively. The ratio of radiated power by ' $P$ ' to ' $Q$ ' is

1 $\frac{25}{9}$
2 $\frac{74}{9}$
3 $\frac{16}{9}$
4 $\frac{64}{9}$
MHT-CET 2020
Heat Transfer

149514 Two spheres ' $S_{1}$ ' and ' $S_{2}$ ' have same radii but temperatures $T_{1}$ and $T_{2}$ respectively. Their emissive power is same and emissivity is in the ratio $1: 4$. Then the ratio of $T_{1}$ to $T_{2}$ is

1 $\sqrt{2}: 1$
2 $1: \sqrt{2}$
3 $1: 2$
4 $2: 1$
MHT-CET 2020