What is magnetic field strength at a point 21mm radially fro

What is magnetic field strength at a point 2.1mm radially from the center of the wire leading to the capacitor? Express your answer to two significant figures and include the appropriate units. What is the magnetic field strength at a point 2.1mm radially from the center of the capacitor? Express your answer to two significant figures and include the appropriate units.

Solution

a)

From Ampere\'s law ,Magnetic field is given by

B=u_oI/2pir

B=(4pi*10^-7)*14/2pi*(2.1*10^-3)

B=1.33*10^-3 T or 1.33 mT

b)

From Ampere\'s law ,Magnetic field is given by

B=u_oI/2r

B=(4pi*10^-7)*14/2*(2.1*10^-3)

B=4.19*10^-3 T or 4.19 mT