Acurrent carrying loop of wire lies flat on a table top. when viewed from above, the current moves around the loop in a counterclockwise sense. what is the direction of the magnetic field caused by this current, outside the loop? the magnetic field
a) circles the loop in a clockwise direction.
b) points straight up.
c) points straight down.
d) points toward the east.
e) circles the loop in a counterclockwise direction.

B) points straight up.

Explanation:

As per the rule of Right hand thumb rule we know that magnetic field due to a closed loop is given by the direction of the thumb of right hand when our fingers of right hand is curled in the direction of current in the loop.

Here it is given that current is flowing in the loop in counter clockwise direction.

So here we will curl our fingers in counter clockwise direction so due our thumb will indicate perpendicular to the plane of the loop outwards or straight upwards.

So here correct answer will be

B) points straight up.

the box does not move because you need to use a force greater than 300 n. you are only using 50 n. it needs to at least be 301 n for the box to move because then it is an unbalanced force and it will move the way that the greater force is pushing it. if you use only 300 n it will be a balanced force and will not move because the force you are exerting on the   box is the same as its force.

hope this !

im sorry if i went too in depth, i am going to include a link to a video on khan academy that will explain this.   hope that you like the video and that it explains more in detail to you.

that is the link.