Long, straight, vertical wire carries a current upward. Due east of this wire, in what direction does the magnetic field point? A long, straight, vertical wire carries a current upward. Due east of this wire, in what direction does the magnetic field point? north west south upward downward east

The correct answer to the question is;

North

Explanation:

Fleming's left hand rule   states that the direction of a magnetic field acting on a current carrying conductor is perpendicular to both the force acting on the current carrying conductor and the direction of the current.

Therefore, since the direction of the current is upward and a force is acting with a direction towards the east of the wire then the direction of the magnetic field is northwards.

option number c is the right answer.

initial speed when it is dropped is 150 ft/s

now at the same moment the acceleration due to gravity is perpendicular to its velocity

so as we know that

now we have centripetal acceleration a = 32 ft/s^2 as its perpendicular to velocity

while tangential acceleration at the same moment will be zero

so

now radius of curvature is given as

so the radius of curvature just after it is dropped is 703.125 ft