A) \[\frac{2\pi }{t}\]
B) \[\frac{2\pi }{3t}\]
C) \[\frac{\pi }{3t}\]
D) \[\frac{\pi }{t}\]
Correct Answer: B
Solution :
Point A shall record zero magnetic field (due to a-particle) when the a-particle is at position P and Q as shown in figure. The time taken by a-particle to go from P to Q is |
\[t=\frac{1}{3}\,\,\frac{2\pi }{\omega }\] or \[\omega =\frac{2\pi }{3t}\] |
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