A) 2.5 cm
B) 5.0 cm
C) 1.25cm
D) 1.17cm
Correct Answer: A
Solution :
Here, \[M=0.1\text{ }A{{m}^{2}},\] \[B=0.36\]forested\[=0.36\times {{10}^{-4}}J,\] \[F=1.44\times {{10}^{-4}}N\] As \[F=mB\] \[\therefore \] \[m=\frac{F}{B}=\frac{1.44\times {{10}^{-4}}}{0.36\times {{10}^{-4}}}=4\,Am\] As \[M=m\times 2l\] \[\therefore \] \[2l=\frac{M}{m}=\frac{0.1}{4}m=2.5\,m\]You need to login to perform this action.
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