A) \[a{{\ell }^{2}}\]
B) \[b{{\ell }^{2}}\]
C) \[\sqrt{{{a}^{2}}+{{b}^{2}}}{{\ell }^{2}}\]
D) \[\left( {{a}^{2}}+{{b}^{2}} \right){{\ell }^{2}}\]
Correct Answer: A
Solution :
\[\vec{A}={{\ell }^{2}}\hat{i}\] \[\phi =\vec{B}.\vec{A}=(ai+b\hat{j}).({{\ell }^{2}}\hat{i})={{\ell }^{2}}a\]You need to login to perform this action.
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