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Q.

A wire of mass 100 g carrying a current of 2 A towards increasing x is in the form of y =  

{x^2}( - 2m leqslant x leqslant + 2m)

.This wire is placed in a magnetic field    

B= - 0.02{text{ }}hat k

 tesla. The acceleration of the wire (in m / s2 ) is

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a

- 1.6hat j

b

- 3.2hat j

c

1.6hat j

d

2.4hat j

answer is C.

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Detailed Solution

F=il×B

Acceleration =Fm=ilBm=2×4×0.020.1=1.6 m/s2

a=1.6 j^

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