A thin ring of radius R carries a uniform charge Q (assumed positive) as shown. 11. Find an expression for the electrostatic potential along the z-axis, V(z). 12. Now find the electric field along the z-axis and show that you get correct results when you set z=0 and when z is large (but not infinite). P 13. Now assume a positive point charge Q starts at rest from the center of the ring and is given a slight nudge in the z direction. Find an expression for its speed when it is far from the ring. 14. Instead of a charged ring, consider current I flowing clockwise from the point of Họi dĩ x ê 4n r2 view of P. Using the Biot-Savart Law, dB : find the magnetic field along the z-axis.

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A thin ring of radius R carries a uniform charge Q (assumed positive) as shown.
11. Find an expression for the electrostatic potential along the z-axis, V(z).
12. Now find the electric field along the z-axis and show that you get correct results
when you set z=0 and when z is large (but not infinite).
13. Now assume a positive point charge Q starts at rest from the center of the ring
and is given a slight nudge in the z direction. Find an expression for its speed when
it is far from the ring.
14. Instead of a charged ring, consider current I flowing clockwise from the point of
Hoi ds x ô
view of P. Using the Biot-Savart Law, dB =
find the magnetic field
along the z-axis.
Transcribed Image Text:A thin ring of radius R carries a uniform charge Q (assumed positive) as shown. 11. Find an expression for the electrostatic potential along the z-axis, V(z). 12. Now find the electric field along the z-axis and show that you get correct results when you set z=0 and when z is large (but not infinite). 13. Now assume a positive point charge Q starts at rest from the center of the ring and is given a slight nudge in the z direction. Find an expression for its speed when it is far from the ring. 14. Instead of a charged ring, consider current I flowing clockwise from the point of Hoi ds x ô view of P. Using the Biot-Savart Law, dB = find the magnetic field along the z-axis.
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