a) A wire carrying a 21 A current passes between the poles of a strong magnet that is perpendicular to its field and experiences a 2.05 N force on the 4.5 cm of wire in the field. What is the average field strength? Average field strength in tesla =

University Physics Volume 2
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Chapter11: Magnetic Forces And Fields
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Problem 28P: An electron in a TV CRT moves with a speed of 6.0107 m/s, in a direction perpendicular to Earth's...
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(a) A wire carrying a 21 A current passes between the poles of a strong magnet that is perpendicular to its field and experiences a 2.05 N force on the 4.5 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 0.88 and temperature 120°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 o = 5.67 x 10-8 W/m²Tª ) Energy radiated per second in watts =

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