MAGNETIC
EFFECT OF CURRENT
· Magnetic
Effect of Current
· Right Hand
Thumb Rule
· Maxwell’s
Cork Screw Rule
· Biot –Savart’s
Law
Right Hand Thumb Rule:
If a
current carrying conductor is to be hold in the right hand then the thumb
points in the
direction of the current, and tips of the fingers encircling the conductor will
give the direction of the magnetic lines of force.
Maxwell’s Cork Screw Rule:
If motion
of an imaginary right handed screw is in the direction of the current through a
linear conductor, the direction of rotation of the screw gives the direction of
the
magnetic
lines of force around the conductor.
Biot –
Savart’s Law:
The
strength of magnetic field dB due to
a small current carrying element dl carries
a current I at a point P distant
r from current element is directly proportional to I (length
of the wire), dl(value of small element length at which magnetic field is
calculated), sin θ and inverselyproportional to the square of the distance (r2) where
θ is the angle between dl and r.
small magnetic
field at dl is given by
dB α I
dB α dl
dB α sin θ
dB α 1 / r2
dB αI dl
sin θ/r2
dB =μ0 / 4π ( I
dl sin θ /r2 )
Value of μ0 = 4π x 10-7 Tm A-1 .
share us:-
Continue reading with:
- Guass theorem
- Photoelectric effect
- Compton effect
- Semiconductor
- Electrostatics (physics class 12)
- transformer
- Solid state (chemistry class 12)
- Electromagnetic induction
