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Answer 1

Answer:

(b) Zero.

Explanation:

We know that,

F = q(V×B) = qVB.sinø

Where, ø is the angle between the Velocity vector and Magnetic Field vector.

According, to your question:

V = (2i)m/s = 2m/s (along x-axis)

B = (10i)m/s = 10m/s (along x-axis)

Since, both the vectors are directed along same direction(i.e., along x-axis) thus angle between them is zero. That is ø = 0°.

Hence, Magnetic Force (F) = qVB.sin(0°) = 0.