A conducting wheel in which there are fo...

A conducting wheel in which there are four rods of lengthe l as shown in figure is rotating with angular velocity `omega` in a uniform magnetic field B. The induced potential difference between its centre and rim will be

`2B omega l^(2)`

`sqrt(Bl^(2) omega)`

`(Bl omega)/(2)`

`(Bl^(2) omega)/(2)`

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