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Figure(a): enter image description here

When a conductor moving inside magnetic field, of a given length at a certain velocity the induced EMF is:

$$\epsilon = vBL$$

However, what if we changed the position where the bottom wire is connected to the wire like so: enter image description here

Is the induced EMF now:

$$\epsilon = vBL_2$$

I'm not sure how that can be true, when the conductor's length has not changed just the position of where the circuit wire is connected "shortining" the current medium(or path) I agree, however, how would it change the induced EMF? The charges are still at the top & bottom of the conductor, would the terminal wire's connection reduce the induced EMF?

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The magnetic flux intercepted by the conductor will be reduced by connecting the wire at intermediate point of conductor because the effective length of the conductor will now $L_2$ & induced E.M.F. is given as $$\epsilon =vBL_2$$

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  • $\begingroup$ That is my initial thoughts as well, however, the effected length for induced EMF should be $L$ it's the medium moving inside the magnetic field, the top part(having all the positive charge is connected) to the circuit. $\endgroup$ – Pupil Dec 4 '15 at 5:49

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