$\begin {array} {1 1} (a)\;2\upsilon_0 & \quad (b)\;\sqrt{2}\upsilon_0 \\ (c)\;3\upsilon_0 & \quad (d)\;\sqrt 3\upsilon_0 \end {array}$

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The situation becomes clear if we sketch a qualitative diagram however

only a basic understanding of the situation is required to solve the problem

$\sin \theta = \large\frac{L}{r} $$ = \large\frac{L}{\bigg(\Large\frac{mv}{qB} \bigg)}$

$\upsilon \: \alpha\: \large\frac{ 1}{\sin \theta}$

$ \therefore \upsilon_1 = √3 \upsilon_0$

Ans : (d)

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