試卷名稱:111年 - 111 台灣聯合大學系統_碩士班轉學考試_物理類:普通物理#120720
年份:111年
科目:研究所、轉學考(插大)◆普通物理學
(14)Helmholtz coils are sometimes used to obtain a nearly uniform magnetic field in situations where a solenoid would be impractical as shown in the right figure. The magnetic field at the center point on the axis, midway between the coils, how about the derivative of B?
(A)B(x) ≈ B₀ + B'(0)x
(B)B(x) ≈ B₀ + B''(0)x²
(C)B(x) ≈ B₀ + B'''(0)x³
(D)B(x) ≈ B₀ + B''''(0)x⁴
(E)B(x) ≈ B₀ + B'''''(0)x⁵