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Magnetic Field Strength and Magnetic Force O An electrically charged particle moving in a magnetic field may experience a magnetic force. O Magnetic Field Strength B = F/qv (definition of B, only for v perpendicular to B) B = field strength (N/A.m) or Tesla F = force (N) v = m/s q = charge (C)

Magnetic Field Strength and Magnetic Force O An electrically charged particle moving in a magnetic field may experience a magnetic force. O Magnetic Field

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Page 1: Magnetic Field Strength and Magnetic Force O An electrically charged particle moving in a magnetic field may experience a magnetic force. O Magnetic Field

Magnetic Field Strength and Magnetic Force

O An electrically charged particle moving in a magnetic field may experience a magnetic force.

O Magnetic Field Strength B = F/qv (definition of B, only for v perpendicular to B) B = field strength (N/A.m) or Tesla F = force (N) v = m/s q = charge (C)

Page 2: Magnetic Field Strength and Magnetic Force O An electrically charged particle moving in a magnetic field may experience a magnetic force. O Magnetic Field
Page 3: Magnetic Field Strength and Magnetic Force O An electrically charged particle moving in a magnetic field may experience a magnetic force. O Magnetic Field
Page 4: Magnetic Field Strength and Magnetic Force O An electrically charged particle moving in a magnetic field may experience a magnetic force. O Magnetic Field
Page 5: Magnetic Field Strength and Magnetic Force O An electrically charged particle moving in a magnetic field may experience a magnetic force. O Magnetic Field
Page 6: Magnetic Field Strength and Magnetic Force O An electrically charged particle moving in a magnetic field may experience a magnetic force. O Magnetic Field

O 1 T = 1 N/A.mO The magnetic field is sometimes given in

webers per square meter (Wb/m2) when magnetic flux is relevant.

O Magnetic field strength = in Gauss (G) = 0.0001 T 1 gauss = 10-4 T. Tesla = A charge of one coulomb moving with a velocity of one meter per second perpendicular to a magnetic field of one tesla experiences a force of one newton.

Page 7: Magnetic Field Strength and Magnetic Force O An electrically charged particle moving in a magnetic field may experience a magnetic force. O Magnetic Field
Page 8: Magnetic Field Strength and Magnetic Force O An electrically charged particle moving in a magnetic field may experience a magnetic force. O Magnetic Field
Page 9: Magnetic Field Strength and Magnetic Force O An electrically charged particle moving in a magnetic field may experience a magnetic force. O Magnetic Field
Page 10: Magnetic Field Strength and Magnetic Force O An electrically charged particle moving in a magnetic field may experience a magnetic force. O Magnetic Field
Page 11: Magnetic Field Strength and Magnetic Force O An electrically charged particle moving in a magnetic field may experience a magnetic force. O Magnetic Field
Page 12: Magnetic Field Strength and Magnetic Force O An electrically charged particle moving in a magnetic field may experience a magnetic force. O Magnetic Field
Page 13: Magnetic Field Strength and Magnetic Force O An electrically charged particle moving in a magnetic field may experience a magnetic force. O Magnetic Field
Page 14: Magnetic Field Strength and Magnetic Force O An electrically charged particle moving in a magnetic field may experience a magnetic force. O Magnetic Field
Page 15: Magnetic Field Strength and Magnetic Force O An electrically charged particle moving in a magnetic field may experience a magnetic force. O Magnetic Field
Page 16: Magnetic Field Strength and Magnetic Force O An electrically charged particle moving in a magnetic field may experience a magnetic force. O Magnetic Field
Page 17: Magnetic Field Strength and Magnetic Force O An electrically charged particle moving in a magnetic field may experience a magnetic force. O Magnetic Field
Page 18: Magnetic Field Strength and Magnetic Force O An electrically charged particle moving in a magnetic field may experience a magnetic force. O Magnetic Field
Page 19: Magnetic Field Strength and Magnetic Force O An electrically charged particle moving in a magnetic field may experience a magnetic force. O Magnetic Field
Page 20: Magnetic Field Strength and Magnetic Force O An electrically charged particle moving in a magnetic field may experience a magnetic force. O Magnetic Field
Page 21: Magnetic Field Strength and Magnetic Force O An electrically charged particle moving in a magnetic field may experience a magnetic force. O Magnetic Field

O Magnetic Force F = qvB (force on a charged particle, only for v perpendicular to B) F = force (N) q = charge (C) v = velocity (m/s) B = field strength (T) F = qvB sin θ (if the direction of the charge is not perpendicular to the magnetic field)

Page 22: Magnetic Field Strength and Magnetic Force O An electrically charged particle moving in a magnetic field may experience a magnetic force. O Magnetic Field

Problems:O 1. A particle with a charge of -5.0 x

10-4 C moves at a speed of 1.0 x 103 m/s in the +x direction toward a uniform magnetic field of 0.20 T in the +y direction. a.) What is the force on the particle just as it enters the magnetic field? b.) Describe the path of the particle while it is in the field.

Page 23: Magnetic Field Strength and Magnetic Force O An electrically charged particle moving in a magnetic field may experience a magnetic force. O Magnetic Field

O A positive charge of 0.25 C moves horizontally to the right at a speed of 2.0 x 102 m/s and enters a magnetic field directed vertically downward. If it experiences a force of 20 N, what is the magnetic field strength?

O The magnetic field of the earth is measured at a point on the surface to have a magnitude of 0.6 G and is directed downward and northward, making an angle of about 700 with the horizontal. (The earth’s magnetic field varies from place to place. These data are approximately correct for Central U.S.) A proton of charge q = 1.6 x 10-19 C is moving horizontally in the northward direction with speed 107 m/s. Calculate the magnetic force on the proton.

Page 24: Magnetic Field Strength and Magnetic Force O An electrically charged particle moving in a magnetic field may experience a magnetic force. O Magnetic Field

OA charge of 0.050 C moves vertically in a field of 0.800 T that is oriented horizontally. What speed must the charge have to experience a force of 10 N?