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[" 3.A wire PQRS carrying a current I ru...

[" 3.A wire PQRS carrying a current I runs along "],[" three edges of a cube of side "l" as shown.There "],[" exists a uniform magnetic field of magnitude "B],[" along one of the sides of the cube.The "],[" magnitude of the force acting on the wire is "],[[" (a) zero "," (b) "2IIB],[" (c) "sqrt(2)IIB," (d) "2IIB]]

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