Magnetic Field Flashcards

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1
Q

Biot-Savarts Law

A

States
dB = (u•/4||) x idlsin@/r^2

Or

dB = (u•/4||) x qvsin@/r^2

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2
Q

Magnetic field for a current carrying loop

A

B = u•NIr^2 / 2 x (r^2 + x^2)^3/2

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3
Q

Magnetic field at centre of a circular loop

A

B = u•NI/2r

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4
Q

Magnetic field of a current carrying circular arc

A

B = (u•/4||) x I/r x @

Where @-theta

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5
Q

Magnetic field for coplanar concentric circular loops with current flowing in same direction

A

B = (u•/2) x i(1/r1 + 1/r2)

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6
Q

Magnetic field for coplanar concentric circular loops with current flowing in different directions

A

B = (u•/2) x i(1/r1 - 1/r2)

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7
Q

Magnetic field in concentric non-coplanar loops

A

B = (u•/2r) x (i1^2 + i2^2)^1/2

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8
Q

Direction of magnetic field in concentric non coplanar loops

A

Tan@ = B2/B1

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