Two co-axial conducting cylindrical shells having radius 'a' and 'b' (such that b>a).
A Uniform Magnetic field of strength 'B' is existing between cylindrical shells only which is directed along axis of cylinders.
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An electron is emitted (ejected) by the inner shell in radially outward direction with velocity 'v'.

Find the **MAXIMUM** value of velocity 'v' so that this electron will not strike the outer cylindrical shell. ( Give answer in decimals upto 2 places )

**Details and Assumptions:**

1) Neglect all other forces except Magnetic forces.All values are in SI unit system.

2)\(eB=9.1\times { 10 }^{ -31 }, a=5, b=10\),e=charge on electron.

3)\({m}_{e}\)=mass of electron = \(9.1\times { 10 }^{ -31 }\)

**Source**:: Asked In My TesT

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