A 1.50-m-long bar is pulled to the right at asteady 5.0 m/s perpendicular to a u
ID: 1678505 • Letter: A
Question
A 1.50-m-long bar is pulled to the right at asteady 5.0 m/s perpendicular to a uniform 0.75 T magnetic field.The bar rides on parallel metal rails connected through a 25resistor R, so the apparatus makes a complete circuit. The resistance ofthe bar and rails is negligibly small.(a) Determine the emf induced in thecircuit. (Ans: -5.6V) (b) Determine the magnitude and direction ofthe current in the circuit (Ans: 0.23A) (c)Determine the magnitude of the force required to move the bar.(Ans: 0.25N) A 1.50-m-long bar is pulled to the right at asteady 5.0 m/s perpendicular to a uniform 0.75 T magnetic field.The bar rides on parallel metal rails connected through a 25resistor R, so the apparatus makes a complete circuit. The resistance ofthe bar and rails is negligibly small.
(a) Determine the emf induced in thecircuit. (Ans: -5.6V) (b) Determine the magnitude and direction ofthe current in the circuit (Ans: 0.23A) (c)Determine the magnitude of the force required to move the bar.(Ans: 0.25N) (b) Determine the magnitude and direction ofthe current in the circuit (Ans: 0.23A) (c)Determine the magnitude of the force required to move the bar.(Ans: 0.25N)
Explanation / Answer
the emf induced in the circuit is BVL B is magnetic field v is velocity L is length ofthe rod =5*1.5*0.75=5.625V current in the circuit is 5.625V /25=0.225A force required to move the rod now is BiL=0.75*0.225*1.5=0.253N
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