Two circular coils are concentric and lie in the same plane. The inner coil contains 120 turns of wire, has a radius of 0.012m, and carries a current of 6.0A. The outer coil contains 150turns and has a radius of 0.017 m. What must be the magnitudeand direction (relative to the current in the inner coil) ofthe current in the outer coil, such that the net magnetic field atthe common center of the two coils is zero?

Explanation:

From the question we are told that:

Turns of inner coil

Radius of inner coil

Current of  inner coil

Turns of Outer coil

Radius of Outer coil

Generally the equation for Magnetic Field is mathematically given by

Therefore

Condition for the net Magnetic field to be zero

ι вєℓιєνє ιт ιѕ тнє fιяѕт ¢нσι¢є(α.)

нє ѕнσυℓ∂ ѕмιℓє ρσℓιтℓу αи∂ ѕρєαк тσ тнє ρєяѕσи ωнσ ιѕ ιитєяяυριиg αfтєя тнє ∂ιѕ¢υѕѕισи

нσρє ι ¢συℓ∂ нєℓρ.