One of the two identical conducting wires of length is bent in the form of a circular…

PHYSICS · Single correct · AP · Physics 2: Algebra-based · Magnetism and Electromagnetism · Magnetism and Electromagnetism

Problem

One of the two identical conducting wires of length

L

is bent in the form of a circular loop and the other one into a circular coil of

N

identical turns. If the same current is passed in both, the ratio of the magnetic field at the central of the loop (

B_1

) to that at the centre of the coil (

B_C

), i.e.,

\frac{B_L}{B_C}

will be: (1)

N

(2)

\frac{1}{N}

(3)

N^2

(4)

\frac{1}{N^2}