A line of 20 charged particles of radius r attached end to end pass through an i

Question

A line of 20 charged particles of radius r attached end to end pass through an imaginary ring of radius 5r on which we observe the magnetic field. At the given instant, the midpoint of the line of particles is at the center of the ring. The following choices concern the resulting magnetic field on the ring as additional charged particles are added on each end of the line. Additional charged particles cause the resulting magnetic field on the ring to become Ia) smaller Ib) approximateky the same Ic) larger, proportional to the number of charges Why is this? IIa) Because each charge contributes the same amount, so the superposition principle implies a larger field IIb) Because charges that are far away from the observation point have a diminished effect on the resulting magnetic field at the ring. IIc) Because on one side of the ring cancel the magnetic fields of those on the other side of the ring

Explanation / Answer

The mag field on the ring is due to the change in the electric field over the ring. Putting additional charges on either side wont make the field be almost same, y components cancel; out due to the symmetry. ANswer: lb) and llb)

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.