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Standard IX
Physics
Power
At temperatur...
Question
At temperature T, the power related by a body Q watts. At the temperature 2T the power radiated by it will be
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Q.
For a black body at a temperature of
727
∘
C
, Its radiated power is 60 watt and temperature of the surrounding is
227
∘
C
If the temperature of the black body is changed to
1227
∘
C
, Then its radiating power will be
Q.
Power radiated by a black body at temperature
T
1
is
P
and it radiates maximum energy at a wavelength
λ
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. If the temperature of the black body is changed from
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to
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2
, it radiates maximum energy at a wavelength
λ
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2
. The power radiated at
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is:
Q.
A spherical black body with a radius of
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radiates
450
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50
K
. If the radius were helved and the temperature doubled, the power radiated in watts would be
Q.
A sperical black body with a radius of 12 cm radiates 450 W power at 500 K. If the radius were halved and temperature be doubled, the power radiated in watt would be:
Q.
The energy radiated by a black body at
2300
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, its emissive power being
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. When the body is cooled to a temperature
T
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500
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2
. Find the temperature
T
.
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