phy2049_s12_exam2_practice

# Which of the four quadrants have points in x y plane

This preview shows page 1. Sign up to view the full content.

This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: through a uniform magnetic field in the - j direction. The magnetic force on the electron is in the direction: (1) - j (2) j (3) - k (4) k (5) - i Problem 9 The figure shows a rectangular loop of wire of dimensions 10 cm by 5.0 cm. It carries a current of 0.2 A and it is hinged along one long side. It is mounted in the xy plane, and it makes an angle of Θ=30° to the direction of a uniform magnetic field of 0.25 T. What is the magnitude of the torque acting on the loop about the hinge line? (1) 1.0x10- 3 N m (2) 1.3x10- 4 N m (3) 5.0x10- 3 N m (4) 2.2x10- 4 N m (5) 0 Nm Problem 10 A magnetic field CANNOT: (1) change the momentum of a charge (2) exert a force on a charge (3) accelerate a charge (4) change the kinetic energy of a charge (5) exist PHY 2049 Spring 2012 Problem 11 Two wires are aligned with x- and y- axes and carry currents I1 along x- axis and I2 along y- axis as shown. Which of the four quadrants have points in (x, y)- plane where the magnetic field is zero. (a) 2 & 4 (b) 1 & 3 (c) all (d) none...
View Full Document

## This note was uploaded on 01/16/2014 for the course PHY 2049 taught by Professor Any during the Fall '08 term at University of Florida.

Ask a homework question - tutors are online