1. Faraday's Law a. Look at the figure to the right. The magnetic field is constant with a strength of 0.255T. A conducting bar is L=10cm long and moving to the left with a constant speed of v=35m/s. The conducting bar slides over two metal rails with the right end of the rails connected with a b. Look at the figure to the right. It is the same rail system as part a with L=10cm and V=35m/s. However, the constant magnetic field has been replaced with a long straight wire with 50 amps (i=50A). If the top rail is 4cm (a=4cm) from the wire, What direction, clockwise or counterclockwise, will the current flow? What is the induced EMF? L X ● conducting bar(bus). What direction, clockwise or counterclockwise, will the current flow? What is the induced EMF? X . ● XXX X X B ххххх ● ● ● · ● .
1. Faraday's Law a. Look at the figure to the right. The magnetic field is constant with a strength of 0.255T. A conducting bar is L=10cm long and moving to the left with a constant speed of v=35m/s. The conducting bar slides over two metal rails with the right end of the rails connected with a b. Look at the figure to the right. It is the same rail system as part a with L=10cm and V=35m/s. However, the constant magnetic field has been replaced with a long straight wire with 50 amps (i=50A). If the top rail is 4cm (a=4cm) from the wire, What direction, clockwise or counterclockwise, will the current flow? What is the induced EMF? L X ● conducting bar(bus). What direction, clockwise or counterclockwise, will the current flow? What is the induced EMF? X . ● XXX X X B ххххх ● ● ● · ● .
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Step 1: Know the Faraday's law of electromagnetic induction and Lenz's law:
VIEWStep 2: (a) Find the expression for the emf induced in the loop:
VIEWStep 3: (a) Calculate the magnitude of the emf induced in the circuit:
VIEWStep 4: (a) Determine the direction of the current induced in the loop:
VIEWStep 5: (b) Find the expression for the emf induced in the loop:
VIEWStep 6: (b) Calculate the emf induced in the loop:
VIEWStep 7: (b) Determine the direction of the current induced in the loop:
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