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The susceptibility of magnesium at 200 K is 1-8 x 10-5. At what temperature will the susceptibility decrease by 6 x 10"6?
Appears in these question papers
The light from the Sun is found to have a maximum intensity near the wavelength of 470 nm. Assuming the surface of the Sun as a black body, the temperature of the Sun is .................
[Wien's constant b = 2 .898 x l0- 3mK]
(a) 5800 K
(b) 6050 K
(c) 6166 K
(d) 6500 K
A pinhole is made in a hollow sphere of radius 5 cm whose inner wall is at temperature 727oC. Find the power radiated per unit area. [Stefan’s constant σ = 5.7 x 10-8 J/m2 s K4 , emissivity (e) = 0.2]
The susceptibility of magnesium at 300 K is 2.4 x 10-5. At what temperature will the susceptibility increase to 3.6 x 10-5?
The dimensions of emissive power are
(A) [M1 L-2 T-3 ]
(B) [M1 L2 T-3 ]
(C) [M1 L0 T-3 ]
(D) [M1 L0 T-2 ]
Define emissive power and coefficient of emmision of a body.