What is the Magnetic Field at Point O?

Thread starter TuanTran
Start date Jan 15, 2018
Tags

Field Magnetic Magnetic field Point

AI Thread Summary

The discussion revolves around a homework problem related to calculating the magnetic field at a specific point, referred to as Point O. Participants express frustration over understanding how to apply the equations for the magnetic field of a current loop and a long straight wire. There is a request for guidance on how to approach the problem, indicating a lack of clarity on the initial steps. An image link is provided for additional context, but the main focus remains on seeking help with the equations. Overall, the thread highlights the challenges faced in solving magnetic field problems in physics.

Jan 15, 2018

TuanTran

Homework Statement

Homework Equations

Magnetic Field of a Current Loop
The Field of a Long Straight Wire

The Attempt at a Solution

Sorry ! I'm so stupid that i couldn't figure a way to solve this exercise.
I don't know how to start with those two equations.
Please help me !

Physics news on Phys.org

Jan 15, 2018

TuanTran

Sorry for the image : https://imgur.com/a/1pL3o

Thread 'I've come across another fluid pressure problem I don't understand'

Neglect gravity other than that of water; neglect friction. F1=ρgsh=1000*10*1*(1+4)=50000 N; F1=ρgsh=1000*10*0.1*4=4000 N; F3=50000-4000=46000 N?

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 »

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...

View full post »