A long, straight wire carrying a current is placed along the y-axis.
If the direction of the current is in the +y direction, what is the direction of the magnetic field due to this wire as you view it in such a way that the current is coming directly toward you? A) clockwise, around the x-axis
B) counterclockwise, around the x-axis
C) counterclockwise, around the z-axis
D) counterclockwise, around the y-axis
E) clockwise, around the y-axis
Question 2
A wire lying in the plane of this page carries a current directly toward the top of the page.
What is the direction of the magnetic force this current produces on an electron that is moving perpendicular to the page and outward from it on the left side of the wire? A) perpendicular to the page and towards you
B) perpendicular to the page and away from you
C) toward the top of the page
D) toward the bottom of the page
E) The force is zero.
Female scorpion Compsobuthus werneri carrying its young (white)
How Axis Tilt Affects the Intensity of Solar Radiation
To reverse the direction of operation, the polarity of the current through the motor is reversed.
Calculate the magnitude and direction of the resultant for