A Point Charge Is Moving with Speed 2 $\times$ 10⁷ M/s Along the X Axis

question 66

Multiple Choice

A point charge is moving with speed 2 $\times$ 10⁷ m/s along the x axis.At t = 0,the charge is at x = 0 m and the magnitude of the magnetic field at x = 4 m is B₀.The magnitude of the magnetic field at x = 4m when t = 0.1 $\mu$ s is

• A)B₀/2
• B)B₀
• C)B₀/4
• D)2B₀
• E)4B₀

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