An electron traveling horizontally enters a region where a uniform magnetic fiel

Question

An electron traveling horizontally enters a region where a uniform magnetic field is directed into the plane of the paper as shown. Describe the motion of the electron once it has entered the field. upward and parabolic upward and circular downward and circular upward, along a straight line downward and parabolic The additional product of the nuclear fission reaction shown above is 91 36 Kr 92 35 Br 93 36 Kr 93 37 Rb 94 37 Rb The nuclear reaction X rightarrow Y + Z occurs spontaneously. If Mx, My, and Mz are the masses of the three particles, which of the following relationships is true? Mx

Explanation / Answer

8) Downward and circular..

since force on electron is qV x B, direction of force is along -Y direction (downward)

As force is perpndcular to velocity its path is circular...

9)On equating sum of mass numbers and atomic numbers of Products and reactants side,

daughter is 91Kr36

10) Mx > My + Mz

Only This condition makes the reaction exothermic..

11) I and III only (optn C)

Charge is always conserved in any process, which also means no of protons is conserved...

But number of nuclei are not conserved.. In fission many daughter nuclides are formed from single parent..

12) On collision photon looses a part of energy to electron and scatters with enery less than its initial..

hence option C is correct..

13) The Red beam..

Red beam has lower energy than Violet.. (VIBGYOR).. So to deiver same power red beam should incident more number of photons than the violet one..

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