Magnetics 6 Question 24

27. A uniform magnetic field with a slit system as shown in figure is to be used as momentum filter for high-energy charged particles. With a field B Tesla, it is found that the filter transmits α-particles each of energy 5.3 MeV. The magnetic field is increased to 2.3B Tesla and deuterons are passed into the filter. The energy of each deuteron transmitted by the filter is …… MeV.

(1997C, 1M)

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Answer:

Correct Answer: 27. 14.0185

Solution:

  1. Radius of circular path is given by

R=mvBq=pBq=2KmBq

Radius in both the cases are equal. Therefore,

2KαmαBqα=2Kdmd2.3Bqd,qdqα=e2e=12mαmd=42=2Kd=2.3qdqαmαmdKαKd=2.3×12(2)(5.3)MeV,Kd=14.0185MeV



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