問題詳情

45. A rectangular conductor coil has width L = 10 cm, resistance R = 0.3 Ω, and mass m = 100 g. Ignoring the air drag, when the coil falls in a uniform magnetic field B = 10 T, the final terminal velocity value of the coil is: (Gravitational acceleration g = 10 m/s2 )


(A) 0.3 m/s
(B) 0.5 m/s
(C) 0.7 m/s
(D) 3.0 m/s
(E) 5.0 m/s

參考答案

答案：A

統計：A:0,B:0,C:0,D:0,E:0

難度：計算中