A wire carrying a 20.5 A current passes between the poles of a strong magnet that is perpendicular to its field and experiences a 2.46 N force on the 3.75 cm of wire in the field. What is the average field strength? Average field strength in tesla = (b) A spherical surface of area 0.7m2, emissivity 0.85 and temperature 134°C is placed in a large, evacuated chamber whose walls are maintained at a fixed temperature. Find the rate at which radiation is emitted by the surface?( Stefan's constant σ = 5.67 x 10-8 W/m2T4 ) Energy radiated per second in watts =
(a) A wire carrying a 20.5 A current passes between the poles of a strong magnet that is perpendicular to its field and experiences a 2.46 N force on the 3.75 cm of wire in the field. What is the average field strength?
Average field strength in tesla =
(b) A spherical surface of area 0.7m2, emissivity 0.85 and temperature 134°C is placed in a large, evacuated chamber whose walls are maintained at a fixed temperature. Find the rate at which radiation is emitted by the surface?( Stefan's constant σ = 5.67 x 10-8 W/m2T4 )
Energy radiated per second in watts =
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