Two circular loops of wire, with radi of ri and r2 magnitude (I) but opposite direction, as shown below. = 2r1. carry currents of equal r2 Use the Biot-Savart law to derive an expression for the magnetic field at the centre of the loops (i.e. at point O). *"Set up the appropriate integral and simplify as necessary, but do not evaluate this expression. Submit your written work for this question on CrowdMark, and enter the approximate direction of the magnetic field in the blank below*

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Two circular loops of wire, with radii of T1 and r2 = 2r1. carry currents of equal
magnitude (I) but opposite direction, as shown below.
r2
Use the Biot-Savart law to derive an expression for the magnetic field at the centre
of the loops (i.e. at point O). **Set up the appropriate integral and simplify as
necessary, but do not evaluate this expression. Submit your written work for this
question on CrowdMark, and enter the approximate direction of the magnetic field
in the blank below**
Transcribed Image Text:Two circular loops of wire, with radii of T1 and r2 = 2r1. carry currents of equal magnitude (I) but opposite direction, as shown below. r2 Use the Biot-Savart law to derive an expression for the magnetic field at the centre of the loops (i.e. at point O). **Set up the appropriate integral and simplify as necessary, but do not evaluate this expression. Submit your written work for this question on CrowdMark, and enter the approximate direction of the magnetic field in the blank below**
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