A) \[B\ell \sqrt{2gh}\]
B) \[B\ell \sqrt{gh}\]
C) \[2B\ell \sqrt{gh}\]
D) \[2B\ell \sqrt{2gh}\]
Correct Answer: C
Solution :
The effective length is \[AC={{l}_{0}}=\sqrt{{{\ell }^{2}}+{{\ell }^{2}}}=\sqrt{2}\ell \] Induced emf \[=\varepsilon -B{{l}_{0}}v\] \[=B\sqrt{2}\ell \sqrt{2gh}=2B\ell \sqrt{gh}\] \[[\because \,v=\sqrt{2gh}]\] Hence, the correction option is [c].You need to login to perform this action.
You will be redirected in
3 sec