Problem: A long, straight wire extends into and out of the screen. The current in the wire isa) Out of the screen.b) There is no current in the wire.c) Into the screen.d) There is not enough information to tell the direction.

FREE Expert Solution

The compass needle is in a counter-clockwise rotation. 

Using the right-hand rule, the thumb is in the direction of the current and the fingers are curled in the line passing through the thumb. The fingers give the magnetic field direction. 

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Problem Details

A long, straight wire extends into and out of the screen. The current in the wire is

media/d57/d5716273-b368-42cf-9904-1b

a) Out of the screen.

b) There is no current in the wire.

c) Into the screen.

d) There is not enough information to tell the direction.