magnetic field Flashcards
biot savart law formula
db=uo(idlsintheta)/4pir²
magnetic field due to finite straight current carrying wire
B=uo i(sinphi1+sinphi2)/4pi.a
B due to straight infinite wire
uo/4pi (2i/a)
B due to current carryIng circular loop
B=uo.i/2a
B on the axis of current carrying circular loop
uo.iR²/2(R²+x²)^3/2
amperes circuital law state
line integral of B around any closed path in free space is uo times the net current through surface enclosed
solenoid rests in which direction on suspending
N-S
B due to solenoid
uoni
force on a moving charge in B
F=qvbsintheta
R formula based on formula of F
R=mv/qB
which velocity comp is responsible for circular motion
vsintheta
pitch formula
vcostheta×2pim/qB
lorentz F formula
qE+q(v×b)
w=?
qB/m
force on i carrying wire in B
iblsintheta
F between 2 parallel i carryjng infinite wires
F/l=10^-7×(2i1i2/d)
magnetic moment
M=i.A
torque on current loop
nibasintheta
mcg principle
torque on current loop placed in B
current sensitivity
phi/i=nab/k
voltage sensitivity
phi/V=NAB/KR
shunt formula
S=ig×G/(i-ig)
shunt formula
S=ig×G/(i-ig)
mcg as voltmeter formula
V=ig(G+R)
cyclotron formula for K
K=2pi²mf²r²
f=freq
cyclotron formula for K
K=2pi²mf²r²
f=freq
toroid B
uoNi/2pir
