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`3.57xx10^(-2)T` तीव्रता के अनुपृष्ठ चुंबकीय क्षेत्र के अभाव में एक इलेक्ट्रॉन वृत्तीय कक्षा में घूणर्न कर रहा है। यदि e/m का मान `1.76xx10^(11)` कुलाम/किग्रा हो, तो इलेक्ट्रॉन के परिक्रमण की आवृति होगी:
A. `6.82Hz`
B. 1GHz
C. 100Hz
D. `62.8` MHz

1 Answer

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Best answer
Correct Answer - B
`q vB=(mv^(2))/(r)` अथवा `r=(mv)/(qB)`
तथा `v=romega :. omega(v)/(r)=(qB)/(m)`
परिक्रमण की आवृति
`f=(omega)/(2pi)=((q//m))/(2pi)=(3.57xx10^(-2)xx1.76xx10^(11))/(2xx3.14)`
`=1.0xx10^(9)Hz=1Hz`

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