Question

A vertical wire has (conventional) current flowing through it straight DOWNWARD (toward the ground/toward the center of the Earth). How will the magnetic field 2 meters to the east of the wire compare to the magnetic field 1 meter east of the wire? At 2 meters the magnetic field will be
A. greater in magnitude, and in a different direction than it is 1 m from the wire.
B. smaller in magnitude and in a different direction than it is 1 m from the wire.
C. greater in magnitude and in the same direction as it is 1 m from the wire.
D. smaller in magnitude and in the same direction as it is 1 m from the wire.

Answer 1

Answer:

D

Explanation:

By applying Maxwell's right hand thumb rule,we get the direction  is same but magnitude is less as it is farther from the wire(source)