Topic 5.4

A current carrying wire is in the same plane as a uniform magnetic field. The angle between the wire and the magnetic field is θ . 
The magnetic force on the current carrying wire is 

• zero. 
• into the plane of the paper. 
• out of the plane of the paper. 
• at an angle θ to the direction of the magnetic field. 

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

A charged particle of mass m and charge q is travelling in a uniform magnetic field with speed v such that the magnetic force on the particle is F. The magnetic force on a particle of mass 2m, charge q and speed 2v travelling in the same direction in the magnetic field is 

• 4F. 
• 2F. 
• F. 
• 1/2F. 

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

In the diagram, a long current-carrying wire is normal to the plane of the paper. The current in the wire is directed into the plane of the paper.
Which of the arrows gives the direction of the magnetic field at point P? 

• W
• X
• Y
• Z

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

A rigid loop of insulated wire is placed in a uniform magnetic field strength of 80 mT. The current in this loop is 0.50 A and the angle between the wire and the direction of the magnetic field is 30°. What is the magnitude of the force experienced by a 1.0 cm section of the loop?

• 0 N

• 2.0 × 10⁻⁴ N

• 3.5 × 10⁻⁴ N

• 4.0 × 10⁻⁴ N

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

A charged particle travelling with speed v describes a circular path of radius R in a plane perpendicular to a uniform magnetic field. The orbital period of this particle is T.

The same particle now travels with speed 2v in a circular path in the same plane as before.

What is the orbital period of the particle now?

• 0.25 T

• 0.5 T

• T

• 2 T

Tags

NGSS.HS-PS2-5

The electron is moving in a circular motion as shown. The direction of the magnetic field is

• upward

• downward

• into the page

• out of the page

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

A beam of charged particles is not deflected when it passes through a region where both electric and magnetic fields are present.

Which statement is correct?

• All the particles have the same speed.

• All the particles have the same mass.

• All the particles have the same charge.

• The magnetic field and the electric field are in the same direction.

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5