Question

Consider the two different situations X and Y of two concentric coils of N1 and N2 turns and radii R1 and R2 respectively as shown above. If the magnetic field at O in situation X is Bx and in situation Y is By then Bx−By is

• A. $\frac{μ_0{IN}_2}{ R_1}$
• B. $\frac{μ_0{IN}_1}{ R_1}$
• C. $\frac{μ_0{IN}_2}{ R_2}$
• D. $\frac{μ_0{IN}_1}{ R_2}$

Answer 1

Answer: (C)

$\frac{μ_0{IN}_2}{ R_2}$

Answer 2

The correct option is (C): $\frac{μ_0{IN}_2}{ R_2}$