Question

Two mettallic rings of radius r and rolling on a metallic rod. A magnetic field of magnitude b is applies in the region. The magnitude of potential difference between point a and point c on the two rings , will be

Answer 1

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$V_{A} - V_{o} = \frac{Bω{(2R)}^{2} }{2} = 2Bω{R}^{2} . \: . \: . (i)\\ V_{o} - V_{c} = \frac{Bω{(2R)}^{2} }{2} = 2Bω{R}^{2} . \: . \: . (ii) \\ Adding \: these \: two \: equations \: we \: get,\\ V_{A} - V_{c} =4Bω{R}^{2}$

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