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Find the magnetic force on loop PQRS due...

Find the magnetic force on loop PQRS due to the wire.

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`F_(res) =(mu_0I_1I_2)/(2pia)a(-hati)+(mu_0I_1I_2)/(2pi(2a))a(hati)=(mu_0I_1I_2)/(4pi)(-hati)`
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