Charges of three long charged cylinders centered on 1 axis

AI Thread Summary
The discussion focuses on the electric field generated by three long charged cylinders aligned along a common axis. The central cylinder A has a charge of +3q0, and the task is to determine the charges of cylinders B and C to achieve an electric field of zero at specified points. The initial solutions proposed for the charges were incorrect, as the correct values for point 1 are qB= -3q0 and qC= +3q0, while for point 2, qB= +3q0 and qC= +6q0, and for point 3, qB= +3q0 and qC= -6q0. The discussion highlights the importance of understanding vector concepts in electrostatics to accurately assess the electric field conditions. Ultimately, the correct charge configurations ensure the electric field is zero at the specified locations.
Omar FTM
Messages
12
Reaction score
0
Thread moved from the technical forums, so no Homework Help Template is shown.
The figure shows a section of three long charged cylinders centered on the same axis. Central cylinder A has a uniform charge qA= +3q0.
What are the charges of qb and qc if E is 0 on point >
a) 1 ( between A & B )
b) 2 ( between B & C )
c) 3 ( out side the cylinders )
My solutions were based on the concept of vectors
a) qB= +3q0, qC= -6q0
b) qB= +3q0, qC= +6q0
c) That's impossible. ( the other choices were impossible )
But they were wrong.
Could you explain what's wrong with my solutions ?
 

Attachments

  • 1.jpg
    1.jpg
    5.2 KB · Views: 745
Physics news on Phys.org
I got a) impossible , b)qB= -3q0, qC= +3q0 c) qB= +3q0, qC= -6q0 > They are right. :)
 
Last edited:

Thread 'Rolling without slipping on a curved surface'

Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
View full post »

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »

Similar threads

Calculating flux through a plane cutting two concentric cylinders
Replies
26
Views
1K
Angle of deviation from a magnetic field
Replies
5
Views
2K
Velocity along the cylinder axis
Replies
18
Views
2K
Potential on the axis of a uniformly charged cylinder
Replies
1
Views
5K
Velocity of a charged particle
Replies
11
Views
1K
Charge on a rod of infinite length
Replies
2
Views
2K
Charged particle motion in a magnetic feild
Replies
8
Views
2K
Why is electric field at the center of a charged disk not zero?
Replies
4
Views
3K
Electric potential inside a shell of charge
Replies
3
Views
2K
Find the electric field at a point away from the charged cylinder's axis
Replies
5
Views
1K

Hot Threads

Recent Insights

Back
Top