Basic Physics II 3B. Lecture 18.

UCI Physics 3B: Basic Physics II (Summer 2013)
Lec 18. Basic Physics II
Instructor: Roger McWilliams, Ph.D.

License: Creative Commons CC-BY-SA

Description: Second part of the Basic Physics 3 series. This course covers topics such as: fluid mechanics, thermodynamics,electrostatics (including dc circuits), magnetism (including eletromagnetic induction). The course assumes a working knowledge of calculus and trigonometry.

Recorded on September 5, 2013

[subirkumarbandyopadhyay]

Laplaces Equation in cylindrical coordinate system with apology corrected myself and here by put
d^2V/dr^ 2 + 1/r dV/dr + 1/r^2 d^2V/d@^2 + d^2V/dz^2=0

[subirkumarbandyopadhyay]

B= 4π ni LA some expression may come on derivation by applying BIO SAVART LAW, but make sure first we have to use for circular loop B= 2πnir(x^2 +r^2)^3/2 so for closed to the loop it will come as x=0 here so
B= 2πni/r^2

[eduardomontesinos]

One of the best physics teachers i have seen.... Excellent!!!!

From Rio de Janeiro Brazil

[subirkumarbandyopadhyay]

e= L dI/dt
As @ e ~I current
So, d@/dt= dI/dt
As e = - d@/dt, hence e = L dI/dt

[subirkumarbandyopadhyay]

B(r)~1/r that's follow BIO SAVART LAW

[subirkumarbandyopadhyay]

To attain the maximum current it will take time ∆t that is familiar as time constant.

[subirkumarbandyopadhyay]

$Bds =@
So d@/dt = e = $ Edl
So $ dB/dt ds = $Edl
Now $$(dB/dt) ds = $$curl E ds
Hence dB/dt = ∆×E
This is one out of four Maxwell Electromagnetic Equation.

[subirkumarbandyopadhyay]

Sir, it was in my syallabus of Teacher Traning programme in BARDHAMAN SCIENCE CENTRE UNDER BITM KOLKATA UNDER NCSM MINSTRY OF CULTURE conducted by the District Science Officer Mr Debabrata Mukherjee sir, the one coil under magnetic field oscillate then EMF generated that goes through another coil and so that coil where another BAR MAGNET already inserted fun like started to oscillate for the cause of effect of current on magnet that oscillating force should be
F = (mo/4π) miBl
As a result of action of such force started to oscillate .

[subirkumarbandyopadhyay]

Excellent question you raised most respected sir, in fact sir it is my own relavent study involved with this now a days in my country India, that is intolerable .The basic cause that in last decayed the ENDEAVOUR MOON reborn for continuous reflection of INFRA RED across the periphery of the ELLIPSOIED around SUN is at one focus from which through our decayed the INFRA RED emitted and recived by so called ENDEVOUR MOON placed at one focus so ignition temperature gained and start fusion reaction and ultimately the ENDEAVOUR MOON is orginated right now.For this cause the acceleration due to gravity definitely deviated from its standard value. That I am personally measured already. So it is confirmed matter but not disclosed due to some religious effect may come .That's the only cause. This is Dr Subir Kumar Bandyopadhyay is very kind manner like to drawn your attention with confidence SIR MEAN MOST RESPECTED DR ROGER MCWILLIAMS.OVER TO YOU RIGHT NOW

[subirkumarbandyopadhyay]

According Amperes circuital law wise
for closed loop
$ Bdl= (mo/4π )I

[subirkumarbandyopadhyay]

dF =mo/4π[ i(dl×r)/r^3 ]according to Bio Savart law

[subirkumarbandyopadhyay]

L

|. |

[subirkumarbandyopadhyay]

Due to presence magnetic pemiablity the lines of force more within not out side.