- 1(current)
Q. No.| 1. | \(1000~\text K\) | 2. | \(3000~\text K\) |
| 3. | \(1000^\circ\text C\) | 4. | \(3000^\circ\text C\) |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
If \(\lambda_m\) denotes the wavelength at which the radioactive emission from a black body at a temperature \(T\) K is maximum, then:
1. \(\lambda_m\) is independent of \(T\)
2. \(\lambda_m \propto T\)
3. \(\lambda_m \propto T^{-1}\)
4. \(\lambda_m \propto T^{-4}\)
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
(where \(\lambda_{m}\) is the wavelength at which maximum energy is emitted)
1. Stefan’s law
2. Rayleigh-Jeans law
3. Maxwell-Boltzmann law
4. Wien’s displacement law
(take Wien's constant \(=3~\text{mm}\cdot\text{K}\)):
| 1. | \(1000^\circ\text C\) | 2. | \(1000~\text K\) |
| 3. | \(10000~\text K\) | 4. | \(10^5~\text K\) |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
| 1. | Wien’s displacement Law |
| 2. | Kirchhoff’s Law |
| 3. | Newton’s Law of cooling |
| 4. | Stefan’s Law |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
The dimensions of Wien's constant are:
1. \( \left [ MLTK \right ]\)
2. \( \left [ M^0LT^0K \right ]\)
3. \( \left [ M^0L^0TK \right ]\)
4. \( \left [ MLTK^{-1} \right ]\)
A black body has a wavelength \(\lambda_m\) corresponding to maximum energy at \(2000~\text{K}\). Its wavelength corresponding to maximum energy at \(3000~\text{K}\) will be:
| 1. | \(\dfrac{3}{2}\lambda_m\) | 2. | \(\dfrac{2}{3}\lambda_m\) |
| 3. | \(\dfrac{16}{81}\lambda_m\) | 4. | \(\dfrac{81}{16}\lambda_m\) |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
| Statement I: | A blue star has a higher surface temperature than a red star. |
| Statement II: | According to Wien’s displacement law, the wavelength corresponding to the maximum spectral emissive power of a blackbody is inversely proportional to its absolute temperature. |
| 1. | Statement I is incorrect and Statement II is correct. |
| 2. | Both Statement I and Statement II are correct. |
| 3. | Both Statement I and Statement II are incorrect. |
| 4. | Statement I is correct and Statement II is incorrect. |
1. \(\lambda_{\text{mp}}\propto T\)
2. \(\lambda_{\text{mp}}\propto \Large\frac1T\)
3. \(\lambda_{\text{mp}}\propto T^{1/2}\)
4. \(\lambda_{\text{mp}}\propto T^{\text-1/2}\)
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
1. \(1~\text{mm}\)
2. \(1~\text{m}\)
3. \(10^3~\text{m}\)
4. \(1~\mu\text{m}\)
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
- 1(current)
Q. No.
© 2026 GoodEd Technologies Pvt. Ltd.