The shape of a projectiles trajectory is called an ellipse

ANSWER:

The shape of a projectiles trajectory is not called an ellipse,it is parabolic.

EXPLANATION:

Projectile motion is a kind of motion where an object moves in a bilaterally well-formed, parabolic path. The path that the object follows is called its trajectory. Projectile motion only occurs when there is one force implemented at the start on the trajectory, after which the only restraint is, from the gravity.When we look at the shape of trajectory it forms a parabolic shape as discussed above.

The magnitude of the magnetic field is (50μ₀I/r) T or 6.28 × 10^-5(I/r) T.

At the interior region of the coil, the magnetic field will be outward and the exterior region of the coil, the magnetic field will be inward

Explanation: For the magnitude of the magnetic field, please see the attachment below.

The direction of the magnetic field can be determined using the right hand rule, if you place your fingers (excluding the thumb) on a circle to point in the counter-clockwise direction, your thumb will point outwards; and when the thumb moves around the coil, it will point inwards. The direction of the magnetic field is denoted by the thumb.

Hence, at the interior region of the coil, the magnetic field will be outward ( out of the plain) and the exterior region of the coil, the magnetic field will be inward (into the plain)