question archive A solenoid of radius 1
A solenoid of radius 1
Subject:PhysicsPrice: Bought3
A solenoid of radius 1.0 m with 800 turns and a length of 4.6 m surrounds a pigeon cage.
What current must be in the solenoid so that the solenoid field just cancels Earth's 4.2 × 10^−5-T magnetic field (used occasionally by the pigeons to determine the direction they travel)?
units - A
