A particle is relocating parallel to a unicreate magnetic field. Which of the following statements are true?


Explanation:

The pressure competent by a charged particle in a magnetic area is 

*

This indicates that when a charge particle is moving perpendicular to the area, due to the cross-product, it experiences the most amount of pressure (because 

*
 is equal to 
*
, and also theta equals
*
 as soon as it"s perpendicular). This implies that the charged pwrite-up will experience no force due to the magnetic field once it"s parallel. We know tbelow will be no force on the ppost, and we also recognize that uncharged particles suffer no force in magnetic fields, however we can not say for certain the pwrite-up has no net charge, only being told that it"s moving parallel to the field.

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Example Question #8 : Magnetic Force


 

*

 


A rail device is formed in a magnetic field directed out of the web page as diagrammed above. The rod remains in call with the rails with zero friction as it moves to the best at a consistent velocity of 

*
 due to an exterior force. The distance from one rail to the other is 0.087m. The rails and also the rod have no resistance, yet the resistor has a resistance of 0.0055 Ohms. The magnetic area has actually a magnitude of 0.035T. What is the magnitude and direction of the outside force required to store the rod moving at a constant velocity?


Possible Answers:

*
 to the left


 to the right


*
 to the right


*
 to the left


No force is crucial because the rod is relocating at a continuous velocity


Correct answer:

 to the right


Explanation:

The rod acts as a battery due to its motion in the magnetic field: 

*
. Because tbelow is a closed circuit, this outcomes in current flow:

*

In this easy circuit, the existing is the very same all over, so the exact same current flows with the rod. As such present, the rod feels a force:

*

By the right-hand also preeminence, this magnetic force is directed to the left, so the exterior force should be directed to the ideal. It is exciting to note that the power dissipated in the resistor:

*
 is the same as the power provided by the exterior force:

*

The universe conspires to conserve power.


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Example Question #9 : Magnetic Force


If a 10C charged pwrite-up is traveling perpendicularly to a magnetic field of 5T at a speed of 

*
, what is the pressure proficient by this charged particle?


Possible Answers:

*



*


*


Correct answer:


Explanation:

This question is presenting us through a scenario in which a charged ppost is traveling with a details velocity with a magnetic field. In this case, we"re being asked to determine what the force experienced by this ppost is.

To settle this question, we"ll must identify what kind of force this pshort article is likely to experience. Since we"re told that the ppost is traveling in a magnetic area, it would make sense that this pshort article is going to be impacted by a magnetic force. Hence, we"ll must use the equation for magnetic pressure.

*

In addition, since we"re told in the question stem that this particle is traveling perpendicularly to the magnetic field, we know that 

*
 and also thus 
*
. This helps mitigate the equation down.

*

Now, all we should carry out is plug in the worths offered to us in order to calculate the resulting pressure.

*

*


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Example Question #1 : Magnetic Force


A charged pwrite-up, Q, is traveling alengthy a magnetic field, B, through speed v. What is the magnitude of the pressure the pshort article experiences?


Possible Answers:

Zero


Correct answer:

Zero


Explanation:

Charged pposts just suffer a magnetic pressure as soon as some component of their velocity is perpendicular to the magnetic field. Here, the velocity is parallel to the magnetic field so the ppost does not endure a force. 


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Example Inquiry #21 : Magnetism And Electromagnetism


Mass of electron:

*


An electron enters a magnetic field at velocity

*
and experiences a pressure of
*
. Determine the magnetic area.


Possible Answers:
Correct answer:

*


Explanation:

Use the magnetic force equation:

*

Plug in known worths and also solve for 

*

*

*


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Example Inquiry #671 : Ap Physics 2


*

What direction of pressure would certainly a negative charge at location 

*
relocating left experience because of the magnetic field?


Possible Answers:

Up


Out of the screen


To the left


Down, in the direction of the bottom of the screen


Into the screen


Correct answer:

Dvery own, towards the bottom of the screen


Explanation:

Using the right hand preeminence for a existing transporting wire shows that the magnetic field is mentioning of the screen. Using the right hand dominion for magnetic force on a negatively charged ppost shows the pressure acting downward.


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Example Inquiry #23 : Magnetism And Electromagnetism


Which of the following conditions is not essential in order for a ppost to endure a magnetic force?


Possible Answers:

The pwrite-up need to be of a details size


There need to be a current


The particle need to be moving in a direction that is neither parallel or antiparallel to the direction of an outside magnetic field


All of these conditions are required for a magnetic force to act on a particle


The pwrite-up have to have a charge


Correct answer:

The particle should be of a details size


Explanation:

In this question, we"re asked to identify which answer option falsely represents a necessary problem for a magnetic force to act on a ppost.

To answer this, it is useful to look at the equation for magnetic force.

*

What this equation mirrors is that the magnetic force on a pwrite-up is dependent upon that particle"s charge, its velocity, and also on the toughness of the magnetic field. Alprepared we deserve to rule out a couple of of the answer selections.

Furthermore, this equation additionally reflects that 

*
 cannot be equal to zero. What this indicates is that the particle"s direction of motion cannot be along the magnetic field lines. In other words, the pwrite-up cannot be travelling in a direction that is parallel or antiparallel through the magnetic area.

Lastly, we deserve to view that no where in the above equation is tbelow a variable for the size of the particle. Thus, size is not a need for a particle to endure a magnetic force.


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Example Concern #22 : Magnetism And Electromagnetism


Two electrons are traveling parallel to each various other

*
 apart. The distance between them is perpendicular to their activity. One of them is on a track that prevents it from relocating side to side. The various other one is able to movie in all directions. At what velocity would the magnetic attractive pressure equal the repulsive electrical force?


Possible Answers:

Namong these


Correct answer:

*


Explanation:

Using

*
 

*

*

Where

*
 is the charge restricted to traveling in a single dimension

*
 is the totally free charge

*
 is the distance between the charges

*
 is the velocity of the initially charge

*
 is the velocity of the second charge

*
 is the value of the first charge

*
 is the value of the second charge

*
 and 
*
 are identical as the charges are running parallel to each other

*

Combining equations:

*

*

Solving for 

*

*

Plugging in values:

*

*


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Example Inquiry #25 : Magnetism And Electromagnetism


A proton is traveling parallel to a wire in the exact same direction as the conventional present. The proton is traveling at

*
. The present in the wire is
*
. The proton and the wire are
*
 apart. Determine the magnetic force on the proton.


Possible Answers:

Namong these


Correct answer:

*


Explanation:

Finding the magnetic field at the place of the proton.

*

Converting 

*
 to 
*
 and also plugging in values

*

*

Using

*

*

*


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Example Concern #11 : Magnetic Force


A circuit consists of a 

*
 battery and also a 
*
 resistor in series. Determine the magnitude of the magnetic pressure exterior of the loop 
*
 amethod from the wire on an electron that is stationary.


Possible Answers:

None of these


Correct answer:

None of these


Explanation:

Because the electron is stationary, there will be no magnetic pressure, as magnetic force requires the pshort article to be both charged and to be moving.

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