Question

A conducting bar moves along frictionless conducting rails connected to a 4.00-? resistor as shown in the figure. The length of the bar is 1.60 m and a uniform magnetic field of 2.20 T is applied perpendicular to the paper pointing outward, as shown. 4.00 ? 1.60 m Fapplied Magnetic field is outward (?) a) What is the applied force required to move the bar to the left with a constant speed of 6.00 m/s? b) While the bar is pushed at a constant speed, does the current through the bar increase, decrease or stay the same? Explain. c) Find the current flowing through the resistor. In what direction is the current flowing as the bar moves? d) At what rate is energy dissipated in the 4.00 ? resistor? e) If the bar stops, what is the current through the resistor? Why?

          A conducting bar moves along frictionless conducting rails connected to a 4.00-? resistor as shown in the figure. The length of the bar is 1.60 m and a uniform magnetic field of 2.20 T is applied perpendicular to the paper pointing outward, as shown.

4.00 ?
1.60 m
Fapplied
Magnetic field is outward (?)

a) What is the applied force required to move the bar to the left with a constant speed of 6.00 m/s?
b) While the bar is pushed at a constant speed, does the current through the bar increase, decrease or stay the same? Explain.
c) Find the current flowing through the resistor. In what direction is the current flowing as the bar moves?
d) At what rate is energy dissipated in the 4.00 ? resistor?
e) If the bar stops, what is the current through the resistor? Why?

A conducting bar moves along frictionless conducting rails connected to a 4.00-? resistor as shown in the figure. The length of the bar is 1.60 m and a uniform magnetic field of 2.20 T is applied perpendicular to the paper pointing outward, as shown.

4.00 ?
1.60 m
Fapplied
Magnetic field is outward (?)

a) What is the applied force required to move the bar to the left with a constant speed of 6.00 m/s?
b) While the bar is pushed at a constant speed, does the current through the bar increase, decrease or stay the same? Explain.
c) Find the current flowing through the resistor. In what direction is the current flowing as the bar moves?
d) At what rate is energy dissipated in the 4.00 ? resistor?
e) If the bar stops, what is the current through the resistor? Why?

Added by Zachary J.

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