Q2/ Choose the Correct Answer:1-The heat transfer is not constant when:(a) Temperature remains constant with time(c) Temperature increases with time(b) temperature decreases with time(d) any of these.2-The quantity of heat radiation is not dependent on:(a) Area of the body only(c) Temperature of the body only(b) shape of the body only(d) on all (a), (b) and (c).3-The radial heat transfer rate through hollow cylinder decreases as the ratio of outer radiusto inner radius.(a) decreases(b) increases(c) constant(d) none of the above.4-Heat transfer from higher temperature to low temperature takes place according to:(a) Fourier law(b) First law of thermodynamics(c) Second law of thermodynamics(d) Zeroth law of thermodynamics.5-Stefan-Boltzmann law is expressed as:( a) QσAT4(b) Q = 6 A² T4(c) Q = AT4( d) QσAT2

Ans.5 Law of radiation is Stefan Boltzmann law Heat transfer by radiation is directly proportional…

Answered: 5-Stefan-Boltzmann law is expressed as:…

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5-Stefan-Boltzmann law is expressed as: (a) Q = o AT4 (b) Q = o A? T4 (c) Q = AT4 (d) Q = o AT2

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Thermodynamic Relations

Thermodynamics is the division of physics that deals with the transfer of any kind of energy, whether it be heat, temperature, or work, from one object to another.

Question

Q2/ Choose the Correct Answer:
1-The heat transfer is not constant when:
(a) Temperature remains constant with time
(c) Temperature increases with time
(b) temperature decreases with time
(d) any of these.
2-The quantity of heat radiation is not dependent on:
(a) Area of the body only
(c) Temperature of the body only
(b) shape of the body only
(d) on all (a), (b) and (c).
3-The radial heat transfer rate through hollow cylinder decreases as the ratio of outer radius
to inner radius.
(a) decreases
(b) increases
(c) constant
(d) none of the above.
4-Heat transfer from higher temperature to low temperature takes place according to:
(a) Fourier law
(b) First law of thermodynamics
(c) Second law of thermodynamics
(d) Zeroth law of thermodynamics.
5-Stefan-Boltzmann law is expressed as:
( a) QσAT4
(b) Q = 6 A² T4
(c) Q = AT4
( d) QσAT2

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