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# compare the rate of radiation of metal body at 727°c and 227°c

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## Compare the rates of emission of heat of a black body maintained at 727^oC with 227^oC . If the black body is surrounded by an enclosure (black) at 27^oC , what would be the ratio of their rates of loss of heat.

Click here👆to get an answer to your question ✍️ Compare the rates of emission of heat of a black body maintained at 727^oC with 227^oC . If the black body is surrounded by an enclosure (black) at 27^oC , what would be the ratio of their rates of loss of heat.

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Compare the rates of emission of heat of a black body maintained at 727

Question o C with 227 o

C. If the black body is surrounded by an enclosure (black) at 27

o

C, what would be the ratio of their rates of loss of heat.

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Updated on : 2022-09-05

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A black body emits maximum radiation near wave length λ

8 1 SIMILAR QUESTIONS m ​

. the emissivity of the material is 0.7 if the absolute temperature of the black body is doubled, then

This question has multiple correct options

Two copper metal spheres A and B of same mass and surface areas at temperatures at T

Medium View solution > A ​ =80 o C and T B ​ =50 o

C are kept separated in a heat resistant box. Due to ______ temperatures of A and B are changing and reaching a constant temperature of ______ C. Heat transfer takes place by ______, but if both spheres are in contact heat transfer is by _______.

Medium View solution >

### Which of the  following is more close to a black body?

For a black body at a temperature of 727

Medium View solution > ∘

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

The υ

Medium View solution > m ​

curve for a perfect black body is -

Medium View solution > MORE FROM CHAPTER

Thermal Properties of Matter

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## Compare the rate of radiation of metal body at 727 ""^(@)C and 227 ""^(@)C.

Compare the rate of radiation of metal body at 727 ""^(@)C and 227 ""^(@)C.

Home > English > Class 12 > Physics > Chapter > Question Bank 2021 >

Compare the rate of radiation ...

Compare the rate of radiation of metal body at 727

∘ C ∘C and 227 ∘ C ∘C .

Updated On: 27-06-2022

00 : 010

Step by step solution by experts to help you in doubt clearance & scoring excellent marks in exams.

## Related Videos

645039414 0 4.3 K 1:55

यदि एक कृष्णिका 10 कैलोरी/से विकिरित करती है। कृष्णिका का ताप

227 ∘ C 227∘C है। यदि ताप 727 ∘ C 727∘C

कर दिया जाए, तो विकिरण की दर होगी

639275027 0 6.6 K 2:43 With rate of 7 cal cm −2 s −1 7 cal cm-2s-1

, radiations are emitted from the black body at

227 ∘ C 227∘C

, the rate of emitted radiations at

727 ∘ C 727∘C

will be . . . . . . .

11749687 100 1.8 K 2:00 A black body at 227 ∘ C 227∘C

radiates heat at the rate of cal

c m −2 s −1 cm-2s-1

. At a temperature of

727 ∘ C 727∘C

, the rate of heat radiated in the same unit will be

646941412 16 8.9 K 3:45 A black body at 227 ∘ C 227∘C

radiates heat at the rate of

7cals/c m −2 s −1 7cals/cm-2s-1 At a temperature of 727 ∘ C 727∘C

,the rate of heat radiated in the same units will be

644162141 20 8.3 K

If a black body radiates 10 calories per second at

227 ∘ C 227∘C

727 ∘ C 727∘C

455366602 0 500

একটি কৃষ্ণবস্তু deg 227 C উষ্ণতায় 7cal/সিএম^2 হারে শক্তি বিকিরণ করে।ওই একই এককে deg 727 C উষ্ণতায় বস্তুটির শক্তি বিকিরনের হার হবে

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## Compare the rate of radiation of metal bodies at 727 °C and 227 °C.

Compare the rate of radiation of metal bodies at 727 °C and 227 °C.

Compare the rate of radiation of metal bodies at 727 °C and 227 °C.

### SOLUTION

Given:

T1 = 727 °C = 727 + 273 = 1000 K,

T2 = 227 °C = 227 + 273 = 500 K

[(dQdt)1(dQdt)2]

Formula:

σ dQdt=σAeT4

Calculation:

From formula, σ (dQdt)1=σAeT14 ...............(1) σ (dQdt)2=σAeT24 ...............(2)

Dividing equation (1) by (2),

σ σ

(dQdt)1(dQdt)2=σAeT14σAeT24=(T1T2)4

= (1000)4(500)4=16

The rate of radiation of the metal sphere at 727 °C and 227 °C is 16:1.

Concept: Interpretation of Temperature in Kinetic Theory

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Chapter 3: Kinetic Theory of gases and Radiation - Short Answer I

Q 6 Q 5 Q 7

### APPEARS IN

SCERT Maharashtra Question Bank 12th HSC 2022 Physics (Science) by Maharashtra State Board

Chapter 3 Kinetic Theory of gases and Radiation

Short Answer I | Q 6