A metallic rod of length 'l' is tied to ...

A metallic rod of length 'l' is tied to a string of length 2l and made to rotate with angular speed w on a horizontal table with one end of the string fixed. If there is a vertical magnetic field 'B' in the region, the e.m.f. Induced across the ends of the rod is

`(2Bomegal^(2))/(2)`

`(3Bomegal^(2))/(2)`

`(4B omega l^(2))/(2)`

`(5B omega l^(2))/(2)`

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