A positive charge undergoes a brief acceleration at time t = 0 in the –y direc

Question

A positive charge undergoes a brief acceleration at time t = 0 in the –y direction. At the instant shown, the charge lies along the x-axis. Detectors are arranged in a circle of radius R in the x-y plane so that at time t = R/cthe radiation reaches the detectors. At what angle as measured from the positive x-axis will the intensity of the radiated field as measured by the detectors be ½ of its maximum value (for the same distance from the charge)?

A. 45, 135, 225, 315 degrees from the x-axis

B. 0 and 180 degrees from the x-axis

C. 90 and 270 degrees

D. 60, 120, 240, 300

E. 30, 150, 210, 330

Explanation / Answer

45, 135, 225, 315 degrees from the x-axis

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