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If a particle of charge $10^{- 12} C$ moving along the x-axis with a velocity $10^{5}$ m/s. experiences a force of $10^{- 10} N$ in y-direction due to magnetic field, then the minimum magnetic field is.
$10^{- 3} T$ in -ve Z direction
$10^{- 15} T$ in Z direction
$6.25 \times 10^{- 3} T$ in Z direction
$6.25 \times 10^{3} T$ in Z direction

10^{- 15} T

in Z direction

10^{- 3} T

in -ve Z direction

6.25 \times 10^{- 3} T

in Z direction

6.25 \times 10^{3} T

in Z direction

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Solution

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$f = q V B sin θ$

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