EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 15 - Heat Transfer>TS EAMCET 2021 (04-Aug Shift-2)>Q 3

EASY

TS EAMCET

IMPORTANT

Earn 100

Two spheres of same material and radii $5 m$ and $2 m$ are at temperature $200 K$ and $250 K$ respectively. The ratio of energies radiated by them per second is

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Important Questions on Heat Transfer

EASY

TS EAMCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 15 - Heat Transfer>TS EAMCET - 5 August 2021 Shift 2>Q 4

Thermopile Bolometer is used to detect

EASY

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IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 15 - Heat Transfer>TS EAMCET - 5 August 2021 Shift 2>Q 5

The wavelength of the radiation emitted by a black body is

6 mm

and Wein's constant is

3 \times 10^{- 3} mK .

Then temperature of black body is

EASY

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IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 15 - Heat Transfer>TS EAMCET 2019 (03-May Shift-2)>Q 6

A body cools from

70 ° C

to

40 ° C

in

5

minutes. Calculate the time it takes to cool from

60 ° C

to

30 ° C

. The temperature of the surroundings is

20 ° C

.

MEDIUM

TS EAMCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 15 - Heat Transfer>TS EAMCET - 5 August 2021 Shift 1>Q 7

A body cools from

70 ° C

to

40 ° C

in

5 \min .

Calculate the time it takes to cool from

60 ° C

to

40 ° C .

The temperature of the surrounding is

20 ° C .