A thin metal plate of 4 cm diameter is suspended in atmospheric air w – McqOptions

MCQOPTIONS

1.	A thin metal plate of 4 cm diameter is suspended in atmospheric air whose temperature is 290 K. This plate attains a temperature of 295 K when one of its face receives radiant energy from a heat source at the rate of 2 W. If heat transfer coefficient on both surfaces of the plate is stated to be 87.5 W/m 2 K, workout the energy lost by reflection
A.	0.8 W
B.	0.3 W
C.	0.9 W
D.	0.10 W
Answer» D. 0.10 W

Discussion

No Comment Found

Related MCQs

Which one is true for an opaque body?
The total radiant energy A impinging upon a body would be partially or totally absorbed, reflected from its surface or transmitted through it. Identify the correct statement
Radiant energy with an intensity of 800 W/m2 strikes a flat plate normally. The absorptivity is thrice the reflectivity and twice the transmissivity. Determine the rate of reflection
The value of reflectivity depends upon(i) Body temperature(ii) Wavelength of reflected radiation(iii) Nature of surface of bodyIdentify the correct statement
A thin metal plate of 4 cm diameter is suspended in atmospheric air whose temperature is 290 K. This plate attains a temperature of 295 K when one of its face receives radiant energy from a heat source at the rate of 2 W. If heat transfer coefficient on both surfaces of the plate is stated to be 87.5 W/m 2 K, workout the energy lost by reflection
Of the radiant energy 350W/m2 incident upon a surface 250W/m2 is absorbed, 60W/m2 is reflected and the remainder is transmitted through the surface. Workout the value for reflectivity for the surface material
Which one is true for an opaque body?$
Radiant energy with an intensity of 800 W/m<sup>2</sup> strikes a flat plate normally. The absorptivity is thrice the reflectivity and twice the transmissivity. Determine the rate of reflectio?
Thin glass plate is an example of
Which one is true regarding gases?