Heat Transfer

A. absolute temperature (T)
B. I2
C. f
D. t
E. 1/r

A. p = 0, x = 0 and a = 1
B. p=l,x = 0anda = 0
C. p = 0, x = 1 and a = 0
D. x – 0, a + p = 1
E. a=0,x + p= 1.

where a = absorptivity, p = reflectivity, X = transmissivity

A. p = 0, x = 0 and a = 1
B. p=l,T = 0anda = 0
C. p = 0, x = 1 and a = 0
D. x = 0, a + p = 1
E. a = 0, x + p = 1.

where a = absorptivity, p = reflectivity, x = transmissivity

A. Krichoff’s law
B. Stefan’s law
C. Wien’ law
D. Planck’s law
E. Black body law

A. less than those for gases
B. jess than those for liquids
C. more than those for liquids and gases
D. more or less same as for liquids and gases
E. zerci

A. absolute temperature
B. T2
C. T5
D. t
E. l/T

A. p = 0, x = 0 and a = 1
B. p= l,T = 0anda = 0
C. p = 0, x = 1 and a = 0
D. x = 0, a + p = 0
E. a = 0,x + p= 1.
where a = absorptivity, p == reflectivity, X = transmissivity

A. temperature
B. thickness
C. area
D. time
E. area and time

A. 0.45
B. 0.55
C. 0.40
D. 0.75
E. 0.60

A. temperature
B. wave length
C. physical nature
D. all of the above
E. none of the above