Physics

Problem

Two identical point charges, A and B, move through space. For each charge, the velocity vector is perpendicular to the line joining the charge to point P, where the magnetic field is measured. • Charge A: speed

3.0\times10^{6}\,\text{m/s}

, distance from P

0.15\,\text{m}

. • Charge B: speed

2.0\times10^{6}\,\text{m/s}

, distance from P

0.10\,\text{m}

. What is the ratio

\dfrac{B_A}{B_B}

of the magnetic field magnitudes at P due to charges A and B? a)

1.5

0.67

0.44

1.0

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