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A cylindrical bar magnet of radius 1.00 cm and length 10.0 cm has a magnetic dipole moment of magnitude m = 2.00 A · m2. What is the magnetization M, assuming it to be uniform in the magnet? Answer in x10^4(A/m)

A particle having mass m = 2.80E-4 kg carries a negative charge q= −1.70E-6 C . The particle is given an initial velocity in the −y direction (downward), as shown in the figure, of v = 3.65E2 m/s. Everywhere in space there is a uniform constant magnetic field B = 0.340 T pointing in the +z direction, which is out of the plane of the page. What is the radius of the cyclotron orbit trajectory that this particle will move along (in m)?

Ferromagnetic material with μ=4.5 μ0 is in a magnetic field of B=4y less mWb/m². In this case jb=? Please choose one: 

A compact sphere of radius R=10 cm, has a charge Q = 4x10-8 C, uniformly distributed in its volume, and rotates around its axis of symmetry with a constant angular speed of w=40 rad/s. In what percentage does the intensity of the magnetic field in the center of the sphere vary, if its charge "Q" is distributed on its surface?

In an experiment designed to measure the Earth's magnetic field using the Hall effect, a copper bar 0.400 cm thick is positioned along an east- west direction. Assume n = 8.46 × 1028 electrons/m3 and the plane of the bar is rotated to be perpendicular to the direction of B. If a current of 8.00 A in the conductor results in a Hall voltage of 4.20 x 10¯12 v, what is the magnitude of the Earth's magnetic field at this location? µT

What is the strength of the magnetic field at the center of a circular loop of wire of diameter 5.88 cm when a current of 3.48 A flows in the wire? (μ0 = 4π × 10-7 T ∙ m/A) (Use π = 3.14). Express answers in milliTeslas.

A particle having mass m = 2.80E-4 kg carries a negative charge q= −1.70E-6 C . The particle is given an initial velocity in the −y direction (downward), as shown in the figure, of v = 2.41E2 m/s. Everywhere in space there is a uniform constant magnetic field B = 0.340 T pointing in the +z direction, which is out of the plane of the page. What is the the magnetic force that B exerts on the particle (in N; use positive sign if the force points in the +x direction and negative sign if the force points in the −x direction)?

A point charge Q moves on the x-axis in the positive direction with a speed of 644 m/s. A point P is on the y-axis at 43 mm. The magnetic field produced at point P, as the charge moves through the origin, is equal to -6.24 µT in the +z direction. When the charge is at x = 53 mm, what is the magnitude of the magnetic field at point P (in μ.)? μT

An electron ( me = 9.11x1031 kg. q=1.6x10-91 C) moves in a circular path perpendicular to a uniform magnetic field with a magnitude of 7.3 mT. If the speed of the electron is 1.50 x107 m/s, determine the radius of the circular path ( in units of cm). Select one: A. 0.62 B. 1.17 С. 1.72 D. 1.44 E. 0.04