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Question: In a cyclotron, if a deuteron can gain an energy of 40 MeV, then a proton can gain an energy of-...

In a cyclotron, if a deuteron can gain an energy of 40 MeV, then a proton can gain an energy of-

A

(a) 40 MeV

A

(b) 80 MeV

A

(c) 20 MeV

A

(d) 60 MeV

Explanation

Solution

(d)

R =

Q Rd = Rp

\2mdKdqdB=2mpKpqpB\frac { \sqrt { 2 m _ { d } K _ { d } } } { q _ { d } B } = \frac { \sqrt { 2 m _ { p } K _ { p } } } { q _ { p } B } or 2(2 mp)KdeB=2 mpKpeB\frac { \sqrt { 2 \left( 2 \mathrm {~m} _ { \mathrm { p } } \right) \mathrm { K } _ { \mathrm { d } } } } { \mathrm { eB } } = \frac { \sqrt { 2 \mathrm {~m} _ { \mathrm { p } } \mathrm { K } _ { \mathrm { p } } } } { \mathrm { eB } }

\ Kp = 2Kd = 2 × 40 MeV = 80 MeV