Magnetic Field-Quiz

1) A wire carries a current, creating a magnetic field around itself as shown. The current in the wire is:

• A. Directed to the right

• A. Directed to the left

• A. Equal to the magnetic field

• In the same direction as the magnetic field

Tags

NGSS.HS-PS3-5

NGSS.HS-PS2-5

A charged particle is injected into a uniform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will ____:

• move in a straight line

• follow a spiral path

• move along a parabolic path

• move along a waveform

• follow a circular path

Tags

NGSS.HS-PS3-5

A small object with a charge of 𝑞 = +3.0 μ𝐶 and a mass 𝑚 = 2.0 × 10^-6 𝑘𝑔 enters a magnetic field of magnitude 𝐵 = 0.20 𝑇 directed into the page, as shown in the figure below. If the speed of the object is 1000 𝑚/𝑠, the object’s acceleration at the moment it enters the field is most nearly ______.

• zero because the velocity is perpendicular to the magnetic field

• 300 m/s² toward the bottom of the page

• 300 m/s² toward the top of the page

• 600 m/s² toward the bottom of the page

• 600 m/s² toward the top of the page

Tags

NGSS.HS-PS2-1

A particle carrying a charge of +e travels in a circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circular path would have been ____.

• twice the original radius

• four times the original radius

• the same as the original radius

• one-half the original radius

• one-fourth the original radius

Tags

NGSS.HS-PS3-5

NGSS.HS-PS2-5

Four small particles are seen moving through an area with the magnetic field going out of the page. Which of the following statements is consistent with the diagram?

• All the particles are positively charges but have different mass

• All the particles have same mass, but different charges

• Two particles are positive while one is negative

• Two particles are negative while one is positive

• You can only ascertain that all are charged

Tags

NGSS.HS-PS3-5

NGSS.HS-PS2-5

A beam of electrons has speed 10⁷ 𝑚/𝑠. It is desired to use the magnetic field of the Earth,

5 × 10^-5 𝑇, to bend the electron beam into a circle. What will the radius of this circle be?

• 1 nm

• 1 μm

• 1 mm

• 1 m

• 1 km

Tags

NGSS.HS-PS3-5

NGSS.HS-PS2-5

A charged particle of mass 𝑚 is exposed to a constant magnetic field of magnitude 𝐵 and directed out of the page, in which the particle moves in a clockwise circle of radius 𝑅 with a speed 𝑣, as shown below.

In a separate experiment, the same particle is traveling with a speed 2𝑣 in a constant magnetic field of the same magnitude 𝐵, now directed into the page. Which of the following statements is true?

• Now the particle travels in a clockwise circle of radius R

• Now the particle travels in a counterclockwise circle of radius R

• Now the particle travels in a counterclockwise circle of radius 2R

• Now the particle travels in a clockwise circle of radius R/2

• Now the particle travels in a counterclockwise circle of radius R/2

Tags

NGSS.HS-PS3-5

NGSS.HS-PS2-5

A stationary positive charge +Q is located in a

magnetic field B, which is directed toward the right

as indicated. Which of the following is true regarding

the direction of the magnetic force on Q?

• right

• left

• up

• no force

Tags

NGSS.HS-PS3-5

The diagram shows a beam of electrons entering

a magnetic field. The direction of the magnetic field is

out of the page.In what direction does the deflection of the electrons occur?

• Into the page

• Out of the page

• Towards the bottom of the page

• Towards the top of the page

Tags

NGSS.HS-PS3-5

NGSS.HS-PS2-5