A bar magnet is placed in a uniform magnetic field as shown in the diagram. Suggest whether there is a net force on the bar magnet.

Each pole will experience a force that is equal in magnitude and opposite in direction to the force on the other pole, meaning that the net force on the bar is zero.

A bar magnet is placed in a uniform magnetic field as shown in the diagram. Determine how it will move.

The north pole of the bar will be attracted to the south pole of the source, and the opposite for the north pole of the bar. Which means that due to the equal and opposite forces on the two poles, the bar will rotate counter-clockwise.

E M B I B E

Physics for the IB Diploma 6th Edition>Chapter 5 - Electricity and Magnetism>Test yourself>Q 40

HARD

Diploma

IMPORTANT

Earn 100

A long straight wire carries current as shown in the diagram. Two electrons move with velocities that are parallel to the current. Determine the direction of the magnetic force experienced by an electron.

Important Questions on Electricity and Magnetism

HARD

Diploma

IMPORTANT

Physics for the IB Diploma 6th Edition>Chapter 5 - Electricity and Magnetism>Test yourself>Q 40

A long straight wire carries current as shown in the diagram. An electron move with velocities that is perpendicular to the current. Determine the direction of the magnetic force experienced by an electron.

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MEDIUM

Diploma

IMPORTANT

Physics for the IB Diploma 6th Edition>Chapter 5 - Electricity and Magnetism>Test yourself>Q 41

A proton moves past a bar magnet as shown in the diagram. Find the direction of the force it experience.

Question Image

MEDIUM

Diploma

IMPORTANT

Physics for the IB Diploma 6th Edition>Chapter 5 - Electricity and Magnetism>Test yourself>Q 41

A proton moves past a bar magnet as shown in the diagram. Find the direction of the force it experiences.

Question Image

MEDIUM

Diploma

IMPORTANT

Physics for the IB Diploma 6th Edition>Chapter 5 - Electricity and Magnetism>Test yourself>Q 41

A proton moves past a bar magnet as shown in the diagram. Find the direction of the force it experiences.

Question Image

MEDIUM

Diploma

IMPORTANT

Physics for the IB Diploma 6th Edition>Chapter 5 - Electricity and Magnetism>Test yourself>Q 43

A bar magnet is placed in a uniform magnetic field as shown in the diagram.

Question Image

Suggest whether there is a net force on the bar magnet.

MEDIUM

Diploma

IMPORTANT

Physics for the IB Diploma 6th Edition>Chapter 5 - Electricity and Magnetism>Test yourself>Q 43

A bar magnet is placed in a uniform magnetic field as shown in the diagram.

Question Image

Determine how it will move.

HARD

Diploma

IMPORTANT

Physics for the IB Diploma 6th Edition>Chapter 5 - Electricity and Magnetism>Test yourself>Q 44

A high-tension electricity wire running along a north-south line carries a current of

3000 A

. The magnetic field of the Earth at the position of the wire has a magnitude of

5.00 \times 10^{- 5} T

and makes an angle of

30 °

below the horizontal. Calculate the force experienced by a length of

30.0 m

of the wire.

MEDIUM

Diploma

IMPORTANT

Physics for the IB Diploma 6th Edition>Chapter 5 - Electricity and Magnetism>Test yourself>Q 46

A uniform magnetic field is established in the plane of the paper as shown in the diagram, Two wires carry parallel currents of equal magnitudes normally to the plane of the paper at P and Q. Point R is on the line joining P to Q and closer to Q. The magnetic field at position R is zero.

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