Summary Mind map moving charges and magnetism Physics chap: Textbook For Class 12- NEET, JEE
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NEET, JEE
Institution
NEET, JEE
Book
Physics : Textbook For Class Xi
The best study meterial for moving charges and magnetism chapter in Ncert to crack competative exams like Jee, keam, neet, iiser and etc.
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Class notes physics Physics : Textbook For Class Xi
Class notes physics Physics : Textbook For Class Xi
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Biot-Savart Law
Formula of Field for straight wire Field Due to bent wire
dB
Idlsin θ B B2 P
r2 P
dl I B1
μ0 Idlsin θ r
dB = θ r
4π r2 )
I P
) θ/2
μ0 magnetic permiability of r β ) θ/2
)
free space or vaccum I
I
μ0= 4π+ 10-7
μ0 I [1+cos θ/2]
In vector form, Btotal=2+ 4π r
1) At point P A sinθ/2
μ0 +
dB = I dl r B is into the plane
4π r3
μ0 I
B= (sin + sin β ) I
dB is perpendicular to both dl and r using right hand 4π r
screw rule we can find direction of manetic field ) θ/2
B B1 ) θ/2 ) θ/2
2) I I
)
θ/2
Here, B is into the plane F r r
dl
/2
-θ
90
B2
)
r P
θ I
)
μ0 I [1-cos θ/2]
Btotal=2+ 4π r
Examples sinθ/2
A
μ I dl+ (-r) I
1) dB = 4π0 P
r3
-μ0 I dl+ r r P
= dl
4π r3
μ0 I r + dl
= Extend AB downwards and draw a perpendicular from P
4π r3
B
μ0 I (-dl)+ -r
I
eg: Square eg: Hexagon
2) dB = r P
4π
r
3
I
-μ0 I dl+ -r l
=
4π r3 I
-μ0 I r + dl dl A
=
4π r3 β
I
) )
r
μ0 I l l
(sin - sin β )
I (-dl)+ (-r)
B=
μ0 4π r I
3) dB = I
4π r3 P 3) Wire of infinite length
μ0 I dl+ r r I
= =90 and β=90 I
4π r3 l
dl l
μ0 I I
B= (sin 90 + sin 90) =900
4π r P
2 2 μ0 I 3 μ0 I
r
μ0 I β=900
MOVING
=
2π r B= B=
πl πl
4) Wire of semi infinite length
μ0 I
B=
4π r
(sin 90 + sin 0 )
Rectangle
μ
= 0I
I
I
4π r Note:-
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