- 1(current)
Q. No.Radiation energy corresponding to the temperature \(T\) of the sun is \(E.\) If its temperature is doubled, then its radiation energy will be:
1. \(32 E\)
2. \(16 E\)
3. \(8 E\)
4. \(4 E\)
Subtopic: Stefan-Boltzmann Law |
92%
Level 1: 80%+
AIPMT - 1998
Hints
Two spheres \(A\) and \(B\) of same material having radius \(8\) cm and \(4\) cm are maintained at temperatures \(127^{\circ}\text{C}\) and \(527^{\circ}\text{C}\) respectively. The ratio of energy radiated by \(A\) and \(B\) is:
1. \(1:4\)
2. \(3:1\)
3. \(1:2\)
4. \(6:1\)
1. \(1:4\)
2. \(3:1\)
3. \(1:2\)
4. \(6:1\)
Subtopic: Stefan-Boltzmann Law |
84%
Level 1: 80%+
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Hints
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A black body is at a temperature of \(300~ \text{K}.\) The rate at which it emits energy is proportional to:
| 1. | \((300)^1\) | 2. | \((300)^2\) |
| 3. | \((300)^3\) | 4. | \((300)^4\) |
Subtopic: Stefan-Boltzmann Law |
82%
Level 1: 80%+
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Hints
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A black body is at \(727^\circ\text{C}.\) The rate at which it emits energy is proportional to:
| 1. | \((727)^2\) | 2. | \((1000)^4\) |
| 3. | \((1000)^2\) | 4. | \((727)^4\) |
Subtopic: Stefan-Boltzmann Law |
82%
Level 1: 80%+
AIPMT - 2007
Hints
Links
A spherical black body of radius \(10~\text{cm}\) radiates \(100~\text{W}\) power at \(400~\text K.\) If the radius were halved and the temperature doubled, the power radiated in watts would be:
1. \(100\)
2. \(200\)
3. \(400\)
4. \(800\)
1. \(100\)
2. \(200\)
3. \(400\)
4. \(800\)
Subtopic: Stefan-Boltzmann Law |
81%
Level 1: 80%+
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Hints
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The radius of a spherical black body is \(R,\) and \(\alpha\) represents the rate of energy production within the body. The temperature of the given black body in a steady-state is: (where \(\sigma\) is Stefan- Boltzmann constant)
| 1. | \(\left(\dfrac{\alpha}{\sigma \times 4 \pi R^2}\right)^{\dfrac{1}{4}} \) | 2. | \(\left(\dfrac{\sigma \times 4 \pi R^2}{\alpha}\right)^{\dfrac{1}{4}}\) |
| 3. | \(\left(\dfrac{\alpha}{\sigma \times 4 \pi R^2}\right)\) | 4. | \(\left(\dfrac{4 \pi R^2 \times \sigma}{\alpha}\right)\) |
Subtopic: Stefan-Boltzmann Law |
80%
Level 1: 80%+
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Hints
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Subtopic: Stefan-Boltzmann Law |
80%
Level 1: 80%+
AIPMT - 2002
Hints
- 1(current)
Q. No.
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