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A wire loop formed by joining two semici...

A wire loop formed by joining two semicircular sections of radii `R_(1) and R_(2)` and centre C carries a current I as shown in the figure . The resultant magnetic field at C has a magnitude of

A

`(mu_0I)/4(1/R_1-1/R_2)`

B

`(mu_0I)/2(1/R_1-1/R_2)`

C

`(mu_0I)/4(1/R_1+1/R_2)`

D

`(mu_0I)/2(1/R_1+1/R_2)`

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  17. A particle of mass m and charge q moves with a constant velocity V alo...

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