How Do Magnetic Fields Influence Parallel Current-Carrying Wires?

AI Thread Summary
Magnetic fields influence parallel current-carrying wires by creating forces that can either attract or repel them based on the direction and magnitude of the currents. When one wire carries current while the other does not, the magnetic field generated by the active wire affects the force on a nearby charged particle, with specific directional outcomes depending on the current values. If the currents are equal and opposite, the wires repel each other, while parallel currents attract. The right-hand rule is essential for determining the direction of the magnetic field and forces involved. Understanding these principles is crucial for solving related physics problems effectively.
missyc8
Messages
9
Reaction score
0

Homework Statement



In the picture below, the two wires carry current i1 and i2, respectively, with positive current to the right. The charge q is positive and has velocity v to the right.

If i2 = 0 and i1 is greater than zero, then the force on q points into the page.
If i1 = 0 and i2 is greater than zero, then the magnetic field near charge q points into the page.
If i2 = - i1 then the force on q equals zero.
If i1 = 0 and i2 is greater than zero then the force on q is south.
If i1 = - i2, then the wires repel each other.
If i1 is less than i2, then the force on q is south..
If v = 0, then the force on q is zero.


Homework Equations



right hand rule

The Attempt at a Solution


If i2 = 0 and i1 is greater than zero, then the force on q points into the page. T
If i1 = 0 and i2 is greater than zero, then the magnetic field near charge q points into the page. F
If i2 = - i1 then the force on q equals zero.T
If i1 = 0 and i2 is greater than zero then the force on q is south.T
If i1 = - i2, then the wires repel each other.F
If i1 is less than i2, then the force on q is south..T
If v = 0, then the force on q is zero.T
 

Attachments

  • prob13_twowiresq.gif
    prob13_twowiresq.gif
    666 bytes · Views: 908
Physics news on Phys.org
missyc8 said:

Homework Statement



In the picture below, the two wires carry current i1 and i2, respectively, with positive current to the right. The charge q is positive and has velocity v to the right.

If i2 = 0 and i1 is greater than zero, then the force on q points into the page.
If i1 = 0 and i2 is greater than zero, then the magnetic field near charge q points into the page.
If i2 = - i1 then the force on q equals zero.
If i1 = 0 and i2 is greater than zero then the force on q is south.
If i1 = - i2, then the wires repel each other.
If i1 is less than i2, then the force on q is south..
If v = 0, then the force on q is zero.


Homework Equations



right hand rule

The Attempt at a Solution


If i2 = 0 and i1 is greater than zero, then the force on q points into the page. T
If i1 = 0 and i2 is greater than zero, then the magnetic field near charge q points into the page. F
If i2 = - i1 then the force on q equals zero.T
If i1 = 0 and i2 is greater than zero then the force on q is south.T
If i1 = - i2, then the wires repel each other.F
If i1 is less than i2, then the force on q is south..T
If v = 0, then the force on q is zero.T



Could you explain your answers for c) and e) ?

I assume "south" means down as I look at the page, right?
 
yes, south means down the page...

C) true, parallel currents attract each other...?
E)false, because the wires produce a mag. out of page...?
 
missyc8 said:
yes, south means down the page...

C) true, parallel currents attract each other...?
E)false, because the wires produce a mag. out of page...?

Not sure I'm understanding your answers. Could you paste in c) and e) questions, along with your reasoning on each?
 

Thread 'Errors and significant figures'

I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
View full post »
Thread 'Calculation of Tensile Forces in Piston-Type Water-Lifting Devices at Elevated Locations'

Thread 'Calculation of Tensile Forces in Piston-Type Water-Lifting Devices at Elevated Locations'

Figure 1 Overall Structure Diagram Figure 2: Top view of the piston when it is cylindrical A circular opening is created at a height of 5 meters above the water surface. Inside this opening is a sleeve-type piston with a cross-sectional area of 1 square meter. The piston is pulled to the right at a constant speed. The pulling force is（Figure 2）： F = ρshg = 1000 × 1 × 5 × 10 = 50,000 N. Figure 3: Modifying the structure to incorporate a fixed internal piston When I modify the piston...
View full post »
Thread 'A cylinder connected to a hanging mass'

Thread 'A cylinder connected to a hanging mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
View full post »

Similar threads

Calculating Magnetic Field at Point P for Perpendicular Current-Carrying Wires
Replies
2
Views
1K
Solving Current & Power in 4 & 3 Wire Circuits
Replies
9
Views
2K
How Does Induced Current Change with Loop Acceleration Through a Magnetic Field?
Replies
8
Views
1K
Current through capacitors in parallel
Replies
24
Views
2K
Magnetic force on a wire due to a loop
Replies
1
Views
1K
Two parallel wires carrying currents in the same direction.
Replies
2
Views
6K
Two long wires carrying current
Replies
2
Views
1K
Current through left bridge of a Wheatstone Bridge
Replies
2
Views
6K
Different EMFs joined in parallel
Replies
5
Views
2K
Force from a Current in an Infinite Wire on a Square Wire Loop Nearby
Replies
5
Views
3K

Hot Threads

Recent Insights

Back
Top