Question

In a certain region the earth’s magnetic field point vertically down. When a
plane flies due north, which wingtip is positively charged?​

Answer 1

Given info : In a certain region the earth's magnetic field point vertically down. when a plane flies due north.

To find : which wingtip is positively charged.

solution : here given,

direction of earth's magnetic field is downward.

motion of plane is in North direction.

now we have to find direction of current, don't we ?

using Fleming right hand rule,

direction of induced current in West direction.

and we know, direction of current is nothing but direction of positive charged particles.

Thus west wingtip of plane is positively charged.