PHYS Lecture Notes - Lecture 5: South Pole, Magnetic Dip, Magnetic Declination

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mehdotstorm

31 Mar 2023

School

Indian Institute of Technology - IIT Kanpur

Department

Physics

Course

PHYS

Professor

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, then, (cid:1)(cid:2) (cid:1)(cid:2: the force on it is zero, the torque on it is mxb, its potential energy is (cid:1)(cid:2) (cid:1)(cid:2) (cid:1)(cid:2) (cid:1)(cid:2) . m b where we choose the zero of energy at the orientation when m is perpendicular to b (cid:1)(cid:2) (cid:1)(cid:2: consider a bar magnet of size l and magnetic moment m (cid:1)(cid:2) , at a distance r from its mid point, where r >>l, the magnetic field b due to this bar is, (cid:1)(cid:2) (cid:1)(cid:2) (cid:1)(cid:2) 3 r (along axis) (along equator: gauss"s law for magnetism: It states that the net magnet flux through any closed surface is zero. Three quantities are needed to specify the magnetic field of the earth on its surface: the horizontal component, the magnetic declination, the magnetic dip. These are known as the elements of the earth"s magnetic field: magnetic intensity: Consider a material placed in an external magnetic field (cid:1)(cid:1)(cid:2)

Related Questions

1.Which describes the torque on a magnetic dipole in a uniform magnetic field?

a	It tends to rotate the dipole so that the dipole moment vector is in the direction of the magnetic field.

b	It tends to rotate the dipole so that the dipole moment vector is perpendicular to the magnetic field.

c	It tends to rotate the dipole so that the dipole moment vector is in the direction opposite that of the magnetic field.

2. Which describes the vector calculations of the potential energy and torque for a magnetic dipole in a magnetic field?

a	The potential energy and the torque both involve a cross product.

b	The potential energy and the torque both involve a dot product.

c	The potential energy involves a cross product; the torque involves a dot product.

d	The potential energy involves a dot product; the torque involves a cross product.

3. A magnetic dipole is in a uniform magnetic field. For which orientation is the potential energy of the dipole least?

a	The dipole moment is in the direction of the magnetic field.

b	The dipole moment is perpendicular to the magnetic field.

c	The dipole moment is in the direction opposite that of the magnetic field.

ceriserabbit285

Magnetism and Magnetic Fields

1. True or False: Isolated magnetic poles can be found in nature,just like isolated electric charges.
2. True or False: The south pole of a magnet attracts the northpole of a compass.
3. True or False: The planet Earthâs geographic North Pole attractsthe north pole of a compass.

(2)
9. A triangular circuit is formed with a current of 2A runningthrough each wire, and a magnetic field of magnitude 0.4T isdirected perpendicularly to the circuit into the page.
a.) Find the magnetic force acting on all three wires within thecircuit.
b.) Find the net force on the circuit. (Show your work for fullcredit!)

Which is a key difference between electric charges and magnetic poles?

a. Like electric charges repel but like magnetic poles attract.

b. An electrically charged rod attracts an electrically neutral object but a magnet does not attract an unmagnetized chunk of iron.

c. In electricity, unlike charges, repel, but in magnetism, unlike poles attract.

d. Magnetic monopoles exist but isolated electric charges are never found.

e. Electric charges can be separated while magnetic poles always occur together as opposite poles of equal strength.

brownsea-lion330

PHYS Lecture Notes - Lecture 5: South Pole, Magnetic Dip, Magnetic Declination

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