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The circuit shows a closed loop with 2 resistors that are connected in vertical branches in an x y plane. The magnetic field inside the loop is B represented by small encircled crosses. The resistors from left to right are 4 ohms with voltage V sub 2 and 2 ohms with voltage V sub 1. The polarity of V sub 1 is negative to positive from top to bottom. The polarity of V sub 2 is in opposite direction of V sub 1. A current I flows counterclockwise in the circuit.