Sapling Learning that is perpendicular of 2.19 cm and negligible resistance s im

Question

Sapling Learning that is perpendicular of 2.19 cm and negligible resistance s immersed in a field circuit. During a to the plane the to resistor to create a closed zero. Find the time interval of 0.169 s the magnetic field strength decreases uniformly from 0.679 T to energy, in milli that is dissipated in the resistor interval. Number 7.65 x 10 mJ There is additional feedback View this feedback by clicking on the bottom divider the bar again to hide the additional feedback. Previous Try Agan Expla lation

Explanation / Answer

According to the given problem,

Let E = the EMF
Let r = the radius = 2.19*10-2 m
Let B = the change in the magnetic field = 0.679 T
Let t = the change in time = 0.169 s
Let N = the number of turns = 121

E = -2r²NB/t

Substituting the values

E = -2*(0.0219)2121*0.679/0.169

E = 1.465V

I = E/R = 1.465/16.9 = 0.0866 A

Energy = I2R*t = 0.08662*16.9*0.169 = 21.46 mJ

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