(a) A spherical surface of area 0.7m, emissivity 0.86 and temperature 148°C is placed in a large,evacuated chamber whose walls are maintained at fixed temperature. Find the rate at whichradiation is emitted by the surface? ( Stefan's constant o = 5.67 x 108 W/m?T)(2 marks)Energy radiated per second in watts =(b) A wire of 3.25 cm, carrying current passes between the poles of a strong magnet that isperpendicular to its field and experiences a 2.12N force due to the field of strength 1.5. What isthe current through the wire?(2 marks)the current through the wire in ampere =

(a) Area, A = 0.7 m2 emissivity, e = 0.86 T = 148 C = 421 K Stefan's constant = 5.67 x 10-8 W/m2T4…

(a) A spherical surface of area 0.7m?, emissivity 0.86 and temperature 148°C is placed in a large, evacuated chamber whose walls are maintained at fixed temperature. Find the rate at which radiation is emitted by the surface? (Stefan's constant o = 5.67 x 108 W/m?T) (2 marks) Energy radiated per second in watts =

(a) A spherical surface of area 0.7m?, emissivity 0.86 and temperature 148°C is placed in a large, evacuated chamber whose walls are maintained at fixed temperature. Find the rate at which radiation is emitted by the surface? (Stefan's constant o = 5.67 x 108 W/m?T) (2 marks) Energy radiated per second in watts =

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter1: Temperature And Heat

Section: Chapter Questions

Problem 128CP: As the very first rudiment of climatology, estimate the temperature of Earth. Assume it is a perfect...

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