PHYSICS 1E03 Study Guide - Midterm Guide: Ferromagnetism, Asteroid Family, Toroid

A cylindrical conductor of radius R = 2.70 cm carries a currentof I = 3.30 A along its length. This current is uniformlydistributed throughout the cross section of the conductor.

(a) Calculate the magnitude of the magnetic field midway along theradius of the wire (that is, at r = R/2).

Round your answer to three significant figures. Take thepermeability of free space to be 4π x 10^(-7) T*m/A.

____________ μT

(b) Find the distance beyond the surface of the conductor at whichthe magnitude of the magnetic field has the same value as themagnitude of the field at r = R/2.

____________cm

A cylindrical conductor of radius R = 2.70 cm carries a currentof I = 3.30 A along its length. This current is uniformlydistributed throughout the cross section of the conductor.

(a) Calculate the magnitude of the magnetic field midway along theradius of the wire (that is, at r = R/2).

Round your answer to three significant figures. Take thepermeability of free space to be 4π x 10^(-7) T*m/A.

____________ μT

(b) Find the distance beyond the surface of the conductor at whichthe magnitude of the magnetic field has the same value as themagnitude of the field at r = R/2.

____________cm

1 - A compass in a magnetic field will line up __________.

(A) - with the north pole pointing perpendicular to the magnetic field

(B) - with the north pole pointing opposite the direction of the magnetic field

(C) - with the north pole pointing in the direction of the magnetic field

2 - The magnetic field lines due to a straight, current-carrying wire are __________.

(A) - straight lines parallel to the wire

(B) - circles around the wire

(C) - straight lines perpendicular to the wire

3 - Two parallel wires carry a current in the same direction. There is ___________ between the wires.

(A) - a repulsive force

(B) - no force

(C) - an attractive force

4 - The direction of the magnetic force on a moving charged particle in a magnetic field is __________.

(A) - both perpendicular to the velocity and perpendicular to the magnetic field

(B) - perpendicular to the magnetic field

(C) - perpendicular to the velocity