magnetic field Flashcards

1
Q

biot savart law formula

A

db=uo(idlsintheta)/4pir²

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2
Q

magnetic field due to finite straight current carrying wire

A

B=uo i(sinphi1+sinphi2)/4pi.a

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3
Q

B due to straight infinite wire

A

uo/4pi (2i/a)

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4
Q

B due to current carryIng circular loop

A

B=uo.i/2a

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5
Q

B on the axis of current carrying circular loop

A

uo.iR²/2(R²+x²)^3/2

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6
Q

amperes circuital law state

A

line integral of B around any closed path in free space is uo times the net current through surface enclosed

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7
Q

solenoid rests in which direction on suspending

A

N-S

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8
Q

B due to solenoid

A

uoni

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9
Q

force on a moving charge in B

A

F=qvbsintheta

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10
Q

R formula based on formula of F

A

R=mv/qB

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11
Q

which velocity comp is responsible for circular motion

A

vsintheta

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12
Q

pitch formula

A

vcostheta×2pim/qB

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13
Q

lorentz F formula

A

qE+q(v×b)

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14
Q

w=?

A

qB/m

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15
Q

force on i carrying wire in B

A

iblsintheta

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16
Q

F between 2 parallel i carryjng infinite wires

A

F/l=10^-7×(2i1i2/d)

17
Q

magnetic moment

18
Q

torque on current loop

A

nibasintheta

19
Q

mcg principle

A

torque on current loop placed in B

20
Q

current sensitivity

A

phi/i=nab/k

21
Q

voltage sensitivity

A

phi/V=NAB/KR

22
Q

shunt formula

A

S=ig×G/(i-ig)

23
Q

shunt formula

A

S=ig×G/(i-ig)

24
Q

mcg as voltmeter formula

25
Q

cyclotron formula for K

A

K=2pi²mf²r²
f=freq

26
Q

cyclotron formula for K

A

K=2pi²mf²r²
f=freq

27
Q

toroid B