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Q.

A charged particle is projected in a magnetic field of [7i−3j]T. The acceleration of the particle is found to be (ai+7j)m/s2. Find the value of a

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a

1

b

0

c

3

d

5

answer is B.

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Detailed Solution

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As the magnetic force and field are perpendicular

B¯⋅F¯=0 (or) B¯⋅a¯=0

7a−21=0⇒a=3

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